feat: add SchemaAdapter system for typemap integration (Zod/Valibot), fix scanner pathToFileURL

- Add from_typemap.ts with SchemaAdapter interface, defaultAdapter, zodAdapter(), valibotAdapter()
- OperationRegistry now accepts optional { schemaAdapter } config; default is TypeBox passthrough
- Adapters use @alkdev/typemap (optional peer dep) with lazy init; detect schemas via ~standard vendor protocol
- Fix scanner pathToFileURL to encode URI components and normalize Windows backslashes
- Add from-typemap sub-path export in package.json and tsup config
- Add test suite covering defaultAdapter, zodAdapter, valibotAdapter, and registry integration

tsup.config.ts

@@ -4,6 +4,7 @@ export default defineConfig({
   entry: [
     'src/index.ts',
     'src/from_mcp.ts',
+    'src/from_typemap.ts',
   ],
   format: ['esm', 'cjs'],
   dts: true,