Refactor Python utilities (#37)

This PR merges an upgrade of the Python utilities with a much more capable
set of common helper functions, and a new common installer in the root
directory which can be used to install multiple layers at the same time. 

This is primarily useful to allow Khronos validation to be installed alongside
our layers, but can be used to install multiple layers too.

.github/workflows/build_test.yaml

@@ -29,14 +29,21 @@ jobs:
 
       - name: Check code style
         run: |
+          python3 -m pycodestyle ./*.py
           python3 -m pycodestyle ./lglpy
           python3 -m pycodestyle ./generator
 
       - name: Check typing
         run: |
+          python3 -m mypy ./*.py
           python3 -m mypy ./lglpy
           python3 -m mypy ./generator
 
+      - name: Run unit tests
+        # Note: Only run tests that do not require a connected device
+        run: |
+          python3 -m lglpy.ui.test
+
   build-ubuntu-x64-clang:
     name: Ubuntu x64 Clang
     runs-on: ubuntu-22.04

.gitignore

@@ -8,11 +8,13 @@ __pycache__
 # CMake build directories
 build*
 
+# Data files and build outputs
+*.gputl
+*.log
+*.so
+
 # Build and debug output files
 /.cache
 /bin*
 /log*
-/scratch*
-/out_*
 /x_*
-