[New feature] Add check style in code for only changed/added files in PR

.clang-format

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+---
+# We'll use defaults from the LLVM style, but with 4 columns indentation.
+BasedOnStyle: LLVM
+IndentWidth: 4
+---
+Language: Cpp
+Standard: c++11
+Cpp11BracedListStyle: true
+# Force pointers to the type for C++.
+DerivePointerAlignment: false
+PointerAlignment: Left
+---
+Language: Proto
+# Don't format .proto files.
+DisableFormat: true

.clang-format-ignore

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+thirdparty/*
+thirdparty_unman/*

.github/workflows/check_clang_format_on_pr.yml

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+name: Check Style in Code
+
+on: [pull_request]
+
+jobs:
+  clang-format:
+    name: Check sources by clang-format for added/changed files in PR
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install LLVM and Clang
+        uses: KyleMayes/install-llvm-action@v2
+        with:
+          version: "18.1.8"
+
+      - name: Install parallel for work with check many files
+        run: |
+          sudo apt-get update
+          sudo apt-get install parallel -y
+
+      - name: Checkout repository code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # for work tj-actions/changed-files
+          persist-credentials: false # for work tj-actions/changed-files
+
+      - name: Get C/C++/Protobuf source files that have added/changed
+        id: changed-files
+        uses: tj-actions/changed-files@v45
+        with:
+          files: '**/*.{h,H,hpp,hh,h++,hxx,c,C,cpp,cc,c++,cxx,ino,pde,cu,proto}'
+          files_ignore: 'thirdparty*/**/*.{h,H,hpp,hh,h++,hxx,c,C,cpp,cc,c++,cxx,ino,pde,cu,proto}'
+
+      - name: List added/changed C/C++/Protobuf source file(s) for check
+        if: steps.changed-files.outputs.any_changed == 'true'
+        run: |
+          for file in ${{ steps.changed-files.outputs.all_changed_files }}; do
+            echo "$file was changed"
+          done
+
+      - name: Check added/changed C/C++/Protobuf source file(s) by clang-format
+        if: steps.changed-files.outputs.any_changed == 'true'
+        run: |
+          parallel clang-format --style=file --Werror  --dry-run --verbose ::: \
+            ${{ steps.changed-files.outputs.all_changed_files }}