chore: deps update (#11981)

# Which Problems Are Solved

After merging #11968 and rechecking the dependabot alerts there are
still some issues leftover.

# How the Problems Are Solved

This pr makes overrides for vulnerable transitive depdencies to force
update to safe versions.
It also upgrades the next.js version in the docs and I also ran `pnpm
update` once more.

# Additional Changes

Removed the mochaawesome dependency is this is not really needed and
seems unmaintained.

# Additional Context

- Precursor: #11968

packages/zitadel-client/knip.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://unpkg.com/knip@5/schema.json",
+  "$schema": "https://unpkg.com/knip@6/schema.json",
   "ignoreDependencies": [
     "@zitadel/proto"
   ]

packages/zitadel-client/package.json

@@ -89,7 +89,7 @@
     "eslint-import-resolver-typescript": "^4.4.4",
     "eslint-plugin-import": "^2.32.0",
     "globals": "^17.4.0",
-    "knip": "^5.88.1",
+    "knip": "^6.2.0",
     "tsup": "^8.5.1",
     "typescript": "^5.9.3",
     "vitest": "^4.1.2"