Update README and workflows (#27)

* Update README

- Overview
- Contributing
- Build and install

* Update workflows

- branches reflect new amd-mainline and amd-staging names instead of main and develop

.github/workflows/continuous-integration.yml

@@ -2,11 +2,11 @@ name: Continuous Integration
 
 on:
   push:
-    branches: [ main, develop ]
+    branches: [ amd-mainline, amd-staging ]
     paths-ignore:
       - '*.md'
   pull_request:
-    branches: [ main, develop ]
+    branches: [ amd-mainline, amd-staging ]
     paths-ignore:
       - '*.md'
 

.github/workflows/formatting.yml

@@ -4,7 +4,7 @@ name: Formatting
 on:
   workflow_dispatch:
   pull_request:
-    branches: [ main ]
+    branches: [ amd-mainline, amd-staging ]
     paths-ignore:
       - '.github/workflows/pull_*.yml'
       - '.github/workflows/linting.yml'