Fix: Correct version resolution for banner and update check (#511)

* Fix: Correct version resolution for banner and update check

Resolves issues where the tool's version was displayed as 'unknown'.

- Modified 'displayBanner' in 'ui.js' and 'checkForUpdate' in 'commands.js' to read package.json relative to their own script locations using import.meta.url.
- This ensures the correct local version is identified for both the main banner display and the update notification mechanism.
- Restored a missing closing brace in 'ui.js' to fix a SyntaxError.

* fix: refactor and cleanup

* fix: chores and cleanup and testing

* chore: cleanup

* fix: add changeset

---------

Co-authored-by: Christer Soederlund <christer.soderlund@gmail.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
 	"name": "task-master-ai",
-	"version": "0.13.2-rc.1",
+	"version": "0.12",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "task-master-ai",
-			"version": "0.13.2-rc.1",
+			"version": "0.12",
 			"license": "MIT WITH Commons-Clause",
 			"dependencies": {
 				"@ai-sdk/anthropic": "^1.2.10",