Forgejo Action: Run npm and cargo commands in the CI.

.forgejo/workflows/ci.yml

@@ -54,6 +54,8 @@ jobs:
     - name: Install Node.js
       uses: actions/setup-node@v4
       with:
+        cache: "npm"
+        cache-dependency-path: 'frontend/package-lock.json'
         node-version: '20'
     
     - name: Install dependencies

.gitignore

@@ -1 +1,2 @@
 .claude/settings.local.json
+target/

Cargo.toml

@@ -0,0 +1,3 @@
+[workspace]
+resolver = "3"
+members = ["backend"]