👷 Add cargo udeps tool

.woodpecker/.validate.yaml

@@ -1,11 +1,11 @@
 steps:
-  - name: format
+  - name: lint - format
     image: rust:1.86
     commands: |
       rustup component add rustfmt
       cargo fmt --all --check
 
-  - name: clippy
+  - name: lint - clippy
     image: rust:latest
     commands: |
       apt update && apt install -y libgtk-3-dev libjavascriptcoregtk-4.1-dev libwebkit2gtk-4.1-dev
@@ -14,6 +14,12 @@ steps:
     # Not ready to block PR on fail
     failure: ignore
 
+  - name: lint - dependencies
+    image: rust:latest
+    commands: |
+      cargo install --locked cargo-udeps
+      cargo udeps
+
   - name: build - web (dockerize)
     image: woodpeckerci/plugin-kaniko
     settings: