Fix CI: replace deprecated actions-rs/cargo with direct run commands

- Replace archived actions-rs/cargo@v1 with direct cargo commands
- Add -- separator before -F flag for cargo-all-features compatibility
- Pass toolchain matrix value to setup-rust-toolchain action

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jdidion

.github/workflows/ci.yml

@@ -60,15 +60,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
-      - uses: actions-rs/cargo@v1
         with:
-          command: install
-          args: cargo-all-features
-      - uses: actions-rs/cargo@v1
-        with:
-          command: build-all-features
-          args: -F ${{ matrix.channel }} --all-targets
-      - uses: actions-rs/cargo@v1
-        with:
-          command: test-all-features
-          args: -F ${{ matrix.channel }} --lib
+          toolchain: ${{ matrix.toolchain }}
+      - name: Install cargo-all-features
+        run: cargo install cargo-all-features
+      - name: Build all feature combinations
+        run: cargo build-all-features -- -F ${{ matrix.channel }} --all-targets
+      - name: Test all feature combinations
+        run: cargo test-all-features -- -F ${{ matrix.channel }} --lib