feat: restructure schemas into versioned folders

- Move schemas.ts and schemas-loose.ts into separate versioned folders
- Create schemas/0.1.ts and schemas/0.2.ts for strict validation
- Create schemas_loose/0.1.ts and schemas_loose/0.2.ts for loose validation
- Add index files to export all historical schema versions
- Update all imports to use schemas/0.2.ts
- Enforce exact version values using z.literal() for both v0.1 and v0.2
- Remove dxt_version support from v0.2 schemas
- Remove all passthrough() from v0.2 strict schemas
- Validate privacy_policies as URLs in v0.2

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/cli.ts

@@ -3,7 +3,7 @@ export * from "./cli/init.js";
 export * from "./cli/pack.js";
 
 // Include all shared exports
-export * from "./schemas.js";
+export * from "./schemas/0.2.js";
 export * from "./shared/config.js";
 export * from "./types.js";