chore(knip): include 'knip.ts' in the root 'tsconfig.json' and remove unnecessary nullish fallback for 'optionalDependencies'

knip.ts

@@ -13,9 +13,9 @@ export default {
       ignore: ['scripts/prepack.js'],
       // Strict mode excludes optional dependencies. Read the declared names
       // so removing a declaration still causes an unlisted dependency error.
-      ignoreDependencies: Object.keys(
-        angularQuery.optionalDependencies ?? {},
-      ).map((dependency) => `${dependency}!`),
+      ignoreDependencies: Object.keys(angularQuery.optionalDependencies).map(
+        (dependency) => `${dependency}!`,
+      ),
     },
     'packages/query-codemods': {
       entry: ['src/v4/**/*.cjs', 'src/v5/**/*.cjs'],

tsconfig.json

@@ -29,5 +29,5 @@
     "target": "ES2020",
     "types": ["node"]
   },
-  "include": ["*.config.*"]
+  "include": ["*.config.*", "knip.ts"]
 }