cicd: new workflow

.github/workflows/fast_checks.yml

@@ -0,0 +1,31 @@
+name: Fast checks to fail fast on any simple code issues
+
+env:
+  CARGO_TERM_COLOR: always
+  RUSTFLAGS: "-D warnings"
+
+on:
+  workflow_call:
+
+jobs:
+  check_rust_formatting:
+    name: Check Rust formating
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Checkout source code
+      uses: actions/checkout@v3
+
+    - name: Run cargo fmt
+      run: cargo fmt -- --check
+
+  check_c_warnings:
+    name: Check C warnings
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Checkout source code
+      uses: actions/checkout@v3
+
+    - name: Make C library to check that it's able to compile without warnings
+      run: make -j CFLAGS="-Werror"