refactor(config): drop per-package lint/fmt blocks redundant with root

The root vite.config.ts lint/fmt settings cascade into every workspace
package, and a package-level lint block merges with — rather than replaces —
the root options. So the `lint.options { typeAware, typeCheck }` and the empty
`fmt: {}` repeated in runtime, testing, and runtime-tests only restated what
each package already inherits.

Remove them. runtime-tests keeps just its `ignorePatterns` (the one genuine
per-package override); typeAware/typeCheck now come from root via the merge.
Verified with `vp check`: no lint or typecheck regression, and the PTY
fixtures stay excluded from lint.

packages/runtime-tests/vite.config.ts

@@ -10,8 +10,6 @@ export default defineConfig({
     exclude: ["integration/pty/**", "node_modules/**"],
   },
   lint: {
-    options: { typeAware: true, typeCheck: true },
     ignorePatterns: ["integration/pty/fixtures/**"],
   },
-  fmt: {},
 });

packages/runtime/vite.config.ts

@@ -8,8 +8,4 @@ export default defineConfig({
     dts: true,
     exports: true,
   },
-  lint: {
-    options: { typeAware: true, typeCheck: true },
-  },
-  fmt: {},
 });

packages/testing/vite.config.ts

@@ -7,8 +7,4 @@ export default defineConfig({
     dts: true,
     exports: true,
   },
-  lint: {
-    options: { typeAware: true, typeCheck: true },
-  },
-  fmt: {},
 });