remove .gitignore and add manual trigger workflow with parameters

.github/workflows/manual.yml

@@ -0,0 +1,32 @@
+name: Manual Trigger with Params
+
+on:
+  workflow_dispatch:
+    inputs:
+      name:
+        description: 'Name of the person to greet'
+        required: true
+        type: string
+      greeting:
+        description: 'Type of greeting'
+        required: true
+        type: string
+      data:
+        description: 'Base64 encoded content of a file'
+        required: false
+        type: string
+
+jobs:
+  greet:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Decode File Content
+        run: |
+          echo "${{ inputs.data }}" | base64 --decode > ./decoded_file.txt
+      - name: Display Greeting
+        run: |
+          echo "${{ inputs.greeting }}, ${{ inputs.name }}!"
+      - name: Display File Content
+        run: |
+          echo "Contents of the file:"
+          cat ./decoded_file.txt

.github/workflows/mydata

@@ -0,0 +1,2 @@
+// {"Hello" : "Mars"}
+SGVsbG8gTWFycw==