Fork @sinclair/typemap to @alkdev/typemap with @alkdev/typebox backend

- Rename package to @alkdev/typemap, update peerDeps to @alkdev/typebox
- Replace all @sinclair/typebox imports with @alkdev/typebox
- Replace @sinclair/hammer build system with standalone build.mjs
- Remove upstream-only files (.github, .vscode, design/, typemap.png)
- Update readme with fork notice and new package names
- Add fork copyright to license

example/prototypes/effect.ts

@@ -29,7 +29,7 @@
 // import { Schema as et } from '@effect/schema/Schema'
 // import { Schema as es } from '@effect/schema'
 // import * as ast from '@effect/schema/AST'
-// import * as tb from '@sinclair/typebox'
+// import * as tb from '@alkdev/typebox'
 
 // // ------------------------------------------------------------------
 // // Effect Guard