ci: restructure and optimize execution conditions

- The code tests will ignore doc changes and vice versa.
- The CI is split in 2 parts for clarity

.github/workflows/ci-code.yml

@@ -0,0 +1,100 @@
+name: CI Code
+
+on:
+  push:
+    branches: [master]
+    paths-ignore:
+      - 'docs/**'
+      - 'apidocs/**'
+      - 'README.md'
+  pull_request:
+    branches: [master]
+    paths-ignore:
+      - 'docs/**'
+      - 'apidocs/**'
+      - 'README.md'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        flavor: [arch, debian, ubuntu]
+
+    name: Linux
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run tests
+        run: |
+          docker build -f Dockerfile.${{ matrix.flavor }} -t profanity .
+          docker run profanity ./ci-build.sh
+
+  code-style:
+    runs-on: ubuntu-latest
+    name: Check coding style
+    continue-on-error: true
+    env:
+      GITHUB_WORKSPACE: ${{ runner.workspace }}
+    steps:
+      - uses: actions/checkout@v4
+      # if this check fails, you have to update the number of auto types known and the list of auto types in the check below
+      - name: Check auto types are up-to-date
+        run: |
+          [[ "$(find src -type f -name '*.[ch]' -exec awk '/^#define auto_[\W]*/ {print $2}' '{}' \; | sort -u | wc -l)" == "8" ]] || exit -1
+      - name: Check auto types are initialized
+        run: |
+          grep -P 'auto_(char|gchar|gcharv|guchar|jid|sqlite|gfd|FILE)[\w *]*;$' -r src && exit -1 || true
+
+      - name: Install clang-format
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y clang-format
+
+      - name: Run clang-format check
+        run: |
+          echo $(clang-format --version)
+          # Find all source files you care about
+          INCLUDE_REGEX='^.*\.((((c|C)(c|pp|xx|\+\+)?$)|((h|H)h?(pp|xx|\+\+)?$))|(ino|pde|proto|cu))$'
+          CHECK_PATH='src'
+          files=$(find "$CHECK_PATH" -name .git -prune -o -regextype posix-egrep -regex "$INCLUDE_REGEX" -print)
+          if [ -z "$files" ]; then
+            echo "✅ No source files found to check."
+            exit 0
+          fi
+          
+          # Run clang-format in dry-run mode and collect any improperly formatted files
+          failed=0
+          for file in $files; do
+            if ! output=$(clang-format --dry-run --Werror --style=file "$file" 2>&1); then
+              echo "❌ Failed on file: $file"
+              echo "$output"
+              echo "----------------------------------------"
+              failed=1
+            fi
+          done
+
+          if [ $failed -ne 0 ]; then
+            echo "🚫 One or more files are not properly formatted."
+          else
+            echo "✅ All files are properly formatted."
+          fi
+          exit $failed
+
+  spell-check:
+    runs-on: ubuntu-latest
+    name: Check spelling
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          sudo apt update
+          sudo apt install -y --no-install-recommends codespell
+      - name: Check spelling
+        run: |
+          codespell