Migrate app/assets/javascripts/import_entities/import_projects/store/index.js to Pinia

app/assets/javascripts/import_entities/import_projects/store/index.js store should be migrated to Pinia using the single-step migration.

Files to cover (non-exhaustive):

• app/assets/javascripts/import_entities/import_projects/store/index.js
• app/assets/javascripts/import_entities/import_projects/store/actions.js
• app/assets/javascripts/import_entities/import_projects/store/getters.js
• app/assets/javascripts/import_entities/import_projects/store/mutations.js
• app/assets/javascripts/import_entities/import_projects/store/state.js
• app/assets/javascripts/import_entities/import_projects/index.js
• app/assets/javascripts/import_entities/import_projects/components/import_projects_table.vue
• app/assets/javascripts/import_entities/import_projects/components/github_status_table.vue
• app/assets/javascripts/import_entities/import_projects/components/provider_repo_table_row.vue

And their respective specs.