feat: create useStore composable

[lauramargar]

EMP-3452

Pull request template

Vuex 3 does not have a store composable and we need a way to get access to the store in the components using the composition API. We have created a useStore composable.

Motivation and context

• Dependencies. If any, specify:
• Open issue. If applicable, link: EMP-3452

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that causes existing functionality to not work as expected)
• Change requires a documentation update

What is the destination branch of this PR?

• Main
• Other. Specify:

How has this been tested?

You can use the useStore composable in an existing component with the defineComponent syntax OR you can create a test component and access there to the useStore composable.

Example of test component:

<template>
  <div>
    <span>{{ test }}</span>
  </div>
</template>

<script lang="ts">
  import { defineComponent } from 'vue';
  import { useStore } from '../composables';
  export default defineComponent({
    setup() {
      const $store = useStore();

      const test = $store.state.x.historyQueries.historyQueries;
      return {
        test
      };
    }
  });
</script>

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review on my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.