ci: register the apps/rental workspace with knip

apps/rental is a workspace but was never added to knip.json, so knip
scanned none of its source and flagged every declared dependency as
unused, failing the knip:deps gate. Add its entry points (adonisrc,
bin, start, config, database, app, commands, inertia, tests) so knip
sees the imports and gates the app like the other workspaces.

Author: Arcoders

knip.json

@@ -67,6 +67,22 @@
       "project": ["**/*.ts"],
       "ignoreDependencies": ["pg"]
     },
+    "apps/rental": {
+      "entry": [
+        "adonisrc.ts",
+        "bin/**/*.ts",
+        "start/**/*.ts",
+        "config/**/*.ts",
+        "database/**/*.ts",
+        "app/**/*.ts",
+        "commands/**/*.ts",
+        "inertia/app/**/*.{ts,tsx}",
+        "inertia/pages/**/*.tsx",
+        "tests/**/*.ts"
+      ],
+      "project": ["**/*.{ts,tsx}"],
+      "ignoreDependencies": ["pg"]
+    },
     "benchmarks": {
       "entry": [
         "src/*/index.ts",