add lint workflow

.github/workflows/lint.yml

@@ -0,0 +1,51 @@
+name: lint cli
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    paths:
+      - '.github/workflows/lint-cli.yml'
+      - 'rookie-rs/src/**'
+
+env:
+  RUST_BACKTRACE: 1
+  CARGO_PROFILE_DEV_DEBUG: 0 # This would add unnecessary bloat to the target folder, decreasing cache efficiency.
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  fmt:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: install Rust stable and rustfmt
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+
+      - name: Run cargo fmt
+        run: cargo fmt --manifest-path ./tooling/cli/Cargo.toml --all -- --check
+
+  clippy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: install Rust stable and clippy
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: rookie-rs
+
+      - name: run Clippy
+        run: cargo clippy --manifest-path ./rookie-rs/Cargo.toml --all-targets --all-features -- -D warnings