feat(deps): upgrade TypeScript to v7 native compiler (tsgo)

- Upgrade typescript from ^6.0.3 to ^7.0.1-rc (native Go compiler)
- Fix type errors caught by TS7's stricter generic variance checking
  in RequestError instantiation (3 handler files)
- Update apps/docs/tsconfig.json: remove deprecated baseUrl,
  bump target from es5 to ES2022 (both removed in TS7)
- Add TS7 to minimumReleaseAgeExclude (rc release within cutoff)

Benchmark results (cold, 37 packages):
  TS6: 6m49s -> TS7 native: 1m35s (~4.3x faster)
  Incremental/warm: ~24x faster (17s for full project)

apps/docs/tsconfig.json

@@ -2,8 +2,7 @@
   "extends": "@docusaurus/tsconfig",
   "compilerOptions": {
     "ignoreDeprecations": "6.0",
-    "baseUrl": ".",
-    "target": "es5",
+    "target": "ES2022",
     "lib": ["dom", "dom.iterable", "esnext"],
     "allowJs": true,
     "skipLibCheck": true,