Feature/add grid2grid code

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches:
+    - main
+    - develop
+    tags:
+    - "*"
+  pull_request:
+    branches:
+    - main
+    - develop
+  pull_request_target:
+    types: [labeled]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash -l {0}
+
+jobs:
+  pre-commit:
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref }}
+    - uses: actions/setup-python@v4
+      with:
+        python-version: 3.x
+    - uses: pre-commit/[email protected]
+
+  unit-tests:
+    name: unit-tests (3.10)
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref }}
+    - name: Install Conda environment with Micromamba
+      uses: mamba-org/provision-with-micromamba@v14
+      with:
+        environment-file: tests/environment-unit-tests.yml
+        environment-name: DEVELOP
+        channels: conda-forge
+        cache-env: true
+        extra-specs: |
+          python=3.10
+    - name: Install package
+      run: |
+        python -m pip install --no-deps -e .
+    - name: Run tests
+      run: |
+        make unit-tests
+
+  type-check:
+    needs: [unit-tests]
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref }}
+    - name: Install Conda environment with Micromamba
+      uses: mamba-org/provision-with-micromamba@v12
+      with:
+        environment-file: environment.yml
+        environment-name: DEVELOP
+        channels: conda-forge
+        cache-env: true
+        cache-env-key: ubuntu-latest-3.10
+        extra-specs: |
+          python=3.10
+    - name: Install package
+      run: |
+        python -m pip install --no-deps -e .
+    - name: Run code quality checks
+      run: |
+        echo type-check not used
+
+  documentation:
+    needs: [unit-tests]
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref }}
+    - name: Install Conda environment with Micromamba
+      uses: mamba-org/provision-with-micromamba@v12
+      with:
+        environment-file: environment.yml
+        environment-name: DEVELOP
+        channels: conda-forge
+        cache-env: true
+        cache-env-key: ubuntu-latest-3.10
+        extra-specs: |
+          python=3.10
+    - name: Install package
+      run: |
+        python -m pip install --no-deps -e .
+    - name: Build documentation
+      run: |
+        make docs-build
+
+  integration-tests:
+    needs: [unit-tests]
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    strategy:
+      matrix:
+        include:
+        - python-version: "3.10"
+              # extra: -minver  # This will need to be uncommented and environment-minver.yml updated if we want to publish on conda
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref }}
+    - name: Install Conda environment with Micromamba
+      uses: mamba-org/provision-with-micromamba@v12
+      with:
+        environment-file: tests/environment-unit-tests${{ matrix.extra }}.yml
+        environment-name: DEVELOP${{ matrix.extra }}
+        channels: conda-forge
+        cache-env: true
+        cache-env-key: ubuntu-latest-${{ matrix.python-version }}${{ matrix.extra }}.
+        extra-specs: |
+          python=${{matrix.python-version }}
+    - name: Install package
+      run: |
+        python -m pip install --no-deps -e .
+    - name: Run tests
+      run: |
+        make unit-tests
+
+  distribution:
+    needs: [integration-tests, type-check, documentation]
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref }}
+    - name: Build distributions
+      run: |
+        $CONDA/bin/python -m pip install build
+        $CONDA/bin/python -m build
+    - name: Publish a Python distribution to PyPI
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_API_TOKEN }}
+
+  notify:
+    if: always() && ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    needs:
+    - pre-commit
+    - unit-tests
+    - type-check
+    - documentation
+    - integration-tests
+    - distribution
+    runs-on: ubuntu-latest
+    steps:
+    - name: Trigger Teams notification
+      uses: ecmwf-actions/notify-teams@v1
+      with:
+        incoming_webhook: ${{ secrets.MS_TEAMS_INCOMING_WEBHOOK }}
+        needs_context: ${{ toJSON(needs) }}

.github/workflows/label-public-pr.yml

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+# Manage labels of pull requests that originate from forks
+name: label-public-pr
+
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+
+jobs:
+  label:
+    uses: ecmwf-actions/reusable-workflows/.github/workflows/label-pr.yml@v2

.github/workflows/notify-new-issue.yml

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+name: Notify new issue
+
+on:
+  issues:
+    types:
+    - "opened"
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Notify new issue
+      uses: ecmwf-actions/notify-teams-issue@v1
+      with:
+        incoming_webhook: ${{ secrets.MS_TEAMS_INCOMING_WEBHOOK }}

.github/workflows/notify-new-pr.yml

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+name: Notify new PR
+
+on:
+  pull_request_target:
+    types:
+    - "opened"
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Notify new PR
+      uses: ecmwf-actions/notify-teams-pr@v1
+      with:
+        incoming_webhook: ${{ secrets.MS_TEAMS_INCOMING_WEBHOOK }}