feat: migrate to TypeScript 6 and add tsgo (#114)

* feat: migrate to TypeScript 6 and add tsgo

- Upgrade typescript from ^5 to ^6 across all packages
- Address TS6 breaking changes in tsconfig files:
  - Add explicit types array (new default is [])
  - Remove deprecated baseUrl (paths work without it)
  - Remove redundant esModuleInterop: true
  - Merge DOM.Iterable into DOM lib
- Install @typescript/native-preview for tsgo CLI
- Enable tsgo in VS Code settings

Co-authored-by: Ona <no-reply@ona.com>

* chore: remove redundant tsconfig comments

Co-authored-by: Ona <no-reply@ona.com>

---------

Co-authored-by: Ona <no-reply@ona.com>

tsconfig.json

@@ -1,6 +1,5 @@
 {
 	"compilerOptions": {
-		// Environment setup & latest features
 		"lib": ["ESNext"],
 		"target": "ESNext",
 		"module": "Preserve",
@@ -8,20 +7,19 @@
 		"jsx": "react-jsx",
 		"allowJs": true,
 
-		// Bundler mode
 		"moduleResolution": "bundler",
 		"allowImportingTsExtensions": true,
 		"verbatimModuleSyntax": true,
 		"noEmit": true,
 
-		// Best practices
+		"types": ["bun"],
+
 		"strict": true,
 		"skipLibCheck": true,
 		"noFallthroughCasesInSwitch": true,
 		"noUncheckedIndexedAccess": true,
 		"noImplicitOverride": true,
 
-		// Some stricter flags (disabled by default)
 		"noUnusedLocals": false,
 		"noUnusedParameters": false,
 		"noPropertyAccessFromIndexSignature": false