Migrate remaining javascript files in webapp/channels/src/plugins to typescript (#29386)

* feat: Migrate actions.js to TypeScript with type annotations

* feat: Migrate actions.js to TypeScript with correct action types

* feat: Add actions plugin for webapp channels

* feat: Migrate actions.js to TypeScript with type annotations

* feat: Add interactive dialog plugin for webapp channels

* feat: Migrate interactive_dialog.js to TypeScript with type definitions

* feat: Add export plugin module for webapp channels

* feat: Migrate export.js to TypeScript with type declarations

* feat: Add initial plugin index file for webapp channels

* feat: migrate plugins/index.js to TypeScript with type definitions

* test: Add export plugin test file

* feat: Migrate export.test.js to TypeScript with type assertions

* feat: Add emoji actions file to webapp channels

* feat: Migrate emoji_actions.js to TypeScript with full type support

* Fixing some issues

* Revert "feat: Migrate emoji_actions.js to TypeScript with full type support"

This reverts commit e64aabe9fc6d36938cbaa40b7acb3356729a6686.

* fixing linter errors

* Fixing CI

* Addressing pr review comments

* Apply suggestions from code review

Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

* Fixing linter errors

* Fixing CI

---------

Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

webapp/channels/package.json

@@ -136,6 +136,7 @@
     "@types/react-window": "1.8.5",
     "@types/react-window-infinite-loader": "1.0.6",
     "@types/redux-mock-store": "1.0.3",
+    "@types/regenerator-runtime": "0.13.8",
     "@types/semver": "7.5.8",
     "@types/shallow-equals": "1.0.3",
     "@types/styled-components": "5.1.32",