Add a github action and config file for running CMake-format (#6849)

* Add a github action and config file for running CMake-format

.github/workflows/cmake-format.yml

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+name: cmake-format
+
+on: [push]
+
+jobs:
+  cmake-format-job:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install cmakelang for cmake-format
+      run: |
+        python3 -m pip install --user cmakelang
+    - uses: actions/checkout@v2
+    - name: Check format - ApplicationCode
+      run: |
+        cd ApplicationCode
+        find -name CMake*.txt | xargs ~/.local/bin/cmake-format -c ${{ github.workspace }}/cmake/cmake-format.py -i
+        git diff
+    - name: Check format - AppFwk
+      run: |
+        cd Fwk/AppFwk
+        find -name CMake*.txt | xargs ~/.local/bin/cmake-format -c ${{ github.workspace }}/cmake/cmake-format.py -i
+        git diff
+    - uses: peter-evans/create-pull-request@v2
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        commit-message: 'Fixes by cmake-format'
+        title: 'Fixes by cmake-format'
+        branch: cmake-format-patches

cmake/cmake-format.py

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+# -----------------------------
+# Options effecting formatting.
+# See: https://github.com/cheshirekow/cmake_format
+# -----------------------------
+with section("format"):
+    # How wide to allow formatted cmake files
+    line_width = 80
+
+    # How many spaces to tab for indent
+    tab_size = 2
+
+    # If true, separate flow control names from their parentheses with a space
+    separate_ctrl_name_with_space = False
+
+    # If true, separate function names from parentheses with a space
+    separate_fn_name_with_space = False
+
+    # If a statement is wrapped to more than one line, than dangle the closing
+    # parenthesis on its own line.
+    dangle_parens = False