Apply clang-format and cmake-format and add style check workflow (#171)

* apply clang-format and cmake-format and add style check workflow

* add declare package definition

* add additional public methods and rename internals

* change development verison tag to 1.0.0

* rename internal method

* rename public method

* rename test var

* update copyright and fix comment

* typo

* run fix-format

* fix test function names

.github/workflows/style.yml

@@ -0,0 +1,28 @@
+name: Style
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  style:
+
+    runs-on: macos-latest
+    
+    steps:
+    - uses: actions/checkout@v1
+    
+    - name: Install format dependencies
+      run: |
+        brew install clang-format
+        pip3 install cmake_format==0.6.11 pyyaml
+
+    - name: configure
+      run: cmake -Htest/style -Bbuild/style
+
+    - name: check style
+      run: cmake --build build/style --target check-format