Upgrade TypeScript to 7.0.2 (native Go compiler)

TypeScript 7 ships as a native Go binary and drastically trims the
package's public JS API surface (no more `main`, and `exports['.']`
now only resolves to lib/version.cjs) since the programmatic compiler
API isn't stable again until 7.1. This broke apps/resolver's tsdown
build, which used rolldown-plugin-dts' tsc-program mode (import ts
from 'typescript'; ts.createProgram(...)) for declaration generation.

Fix by switching that build to isolatedDeclarations, which lets
rolldown-plugin-dts generate .d.ts via its oxc-based path instead of
the TS compiler API entirely. That surfaced two isolatedDeclarations
violations in ontime-types (array/Object.keys initializers lacking
explicit annotations), fixed with explicit `string[]` types matching
their existing inferred type. Also bumped tsdown to pick up its latest
rolldown-plugin-dts, and disabled allowJs in tsconfig.dts.json since
it's incompatible with isolatedDeclarations.

Full workspace typecheck, lint, build, and test suite (1186 tests)
pass under TypeScript 7.0.2.

pnpm-workspace.yaml

@@ -6,7 +6,7 @@ catalog:
   '@types/node': 22.19.11
   rimraf: 6.0.1
   ts-essentials: 10.1.1
-  typescript: 6.0.2
+  typescript: 7.0.2
   vitest: 4.0.17
 
 allowBuilds: