refactor constants (#488)

* Refactor: Separate constants into domain-specific files

Moved constants from a single file into multiple files based on their domain (events, commands, storage, etc.) to improve organization and maintainability.

- Created new files under `src/common/constants/` for each category.
- Created a barrel file `src/common/constants/index.ts` to re-export all constants.
- Updated all import statements throughout the codebase to use the new structure.
- Removed the old `src/common/constants.ts` file.
- Ensured the application builds successfully after changes.

* sloppery slope

* kay

* 3.23.23

* 3.23.24

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: rjmacarthy

package-lock.json

@@ -2,7 +2,7 @@
   "name": "twinny",
   "displayName": "twinny - AI Code Completion and Chat",
   "description": "Locally hosted AI code completion plugin for vscode",
-  "version": "3.23.22",
+  "version": "3.23.24",
   "icon": "assets/icon.png",
   "keywords": [
     "code-inference",
@@ -521,7 +521,7 @@
     "@vscode/vsce": "^3.1.1",
     "copy-webpack-plugin": "^12.0.2",
     "css-loader": "^6.8.1",
-    "esbuild": "^0.21.4",
+    "esbuild": "^0.21.5",
     "esbuild-plugin-copy": "^2.1.1",
     "eslint-plugin-import": "^2.31.0",
     "eslint-plugin-simple-import-sort": "^12.1.1",