feat: initial OmniRoute release (rebranded from 9router)

This project is inspired by and originally forked from 9router by decolua
(https://github.com/decolua/9router).

Full rebrand: 9router → OmniRoute across all source code, configuration,
Docker, documentation, and assets.

.github/workflows/codex-review.yml

@@ -0,0 +1,22 @@
+name: Codex PR Review
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  request-codex-review:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Request Codex Review
+        uses: actions/github-script@v7
+        with:
+          script: |
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+              body: '@codex review'
+            });