[v0.0.3] 2025-08-23

## Context
- Added comprehensive file loading support with `loadPLY()`, `loadOBJ()`, and `loadXML()` methods
- Enhanced `loadPLY()` with 5 overloads supporting origin, height, rotation, color, and upaxis transformations
- Enhanced `loadOBJ()` with 4 overloads including scale transformations and upaxis specification
- Added complete `loadXML()` implementation for Helios XML geometry files
- Extended native C++ wrapper with 9 new file loading functions and proper error handling
- Added comprehensive parameter validation and security path checking
- Implemented `addTriangleTextured()`
- Implemented `addTrianglesFromArraysTextured()`

## Examples
- Added example geometry files: `suzanne.ply`, `suzanne.obj`, `suzanne.mtl`, and `leaf_cube.xml`
- Updated `external_geometry_sample.py` and `stanford_bunny_radiation.py` for demonstration

## Documentation
- Major README.md restructuring with simplified installation and quick start guide
- Streamlined documentation structure with consolidated user guide sections
- Updated Doxygen configuration for cleaner documentation generation
- Removed redundant documentation files and consolidated content

## Testing
- Enhanced existing tests with file loading functionality validation
- Added cross-platform API tests that work with and without native library

Author: bnbailey-psl

.github/workflows/pytest-linux-gpu.yaml

@@ -0,0 +1,94 @@
+name: PyHelios GPU Tests on Linux EC2
+
+on:
+  push:
+    branches: [ "master" ]
+
+env:
+  BUILD_TYPE: Release
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+
+  start-gpu:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: aws-actions/configure-aws-credentials@v2
+        with:
+          role-to-assume: ${{ secrets.OIDC_ROLE_ARN }}
+          aws-region: us-west-2
+      - run: |
+          aws ec2 start-instances --instance-ids ${{ secrets.EC2_INSTANCE_ID }}
+          aws ec2 wait instance-running --instance-ids ${{ secrets.EC2_INSTANCE_ID }}
+
+  run_pyhelios_gpu_tests:
+    runs-on: [self-hosted]
+    needs: start-gpu
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+      
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+      
+      - name: Install PyHelios and dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e .[dev]
+      
+      - name: Build PyHelios with all plugins (GPU included)
+        run: |
+          # Build with all available plugins including GPU-accelerated ones
+          ./build_scripts/build_helios --clean --plugins radiation,visualizer,weberpenntree
+      
+      - name: Check plugin status
+        run: |
+          python -m pyhelios.plugins status
+          python -c "from pyhelios.plugins import print_plugin_status; print_plugin_status()"
+      
+      - name: Run PyHelios GPU tests
+        run: |
+          # Run native-only tests that require GPU plugins
+          if ! pytest -v -m "native_only" --tb=short --log-file=pyhelios_gpu_tests.log; then
+            echo "==== PyHelios GPU tests failed; dumping pyhelios_gpu_tests.log ===="
+            cat pyhelios_gpu_tests.log
+            exit 1
+          fi
+      
+      - name: Run comprehensive test suite
+        run: |
+          # Run full test suite to ensure nothing is broken
+          if ! pytest -v --tb=short --log-file=pyhelios_full_tests.log; then
+            echo "==== PyHelios comprehensive tests failed; dumping pyhelios_full_tests.log ===="
+            cat pyhelios_full_tests.log
+            exit 1
+          fi
+      
+      - name: Upload test logs
+        uses: actions/upload-artifact@v3
+        if: always()
+        with:
+          name: pyhelios-gpu-test-logs
+          path: |
+            pyhelios_gpu_tests.log
+            pyhelios_full_tests.log
+            build_scripts/build.log
+
+  stop-gpu:
+    needs: run_pyhelios_gpu_tests
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+      - uses: aws-actions/configure-aws-credentials@v2
+        with:
+          role-to-assume: ${{ secrets.OIDC_ROLE_ARN }}
+          aws-region: us-west-2
+      - run: |
+          aws ec2 stop-instances --instance-ids ${{ secrets.EC2_INSTANCE_ID }}
+          aws ec2 wait instance-stopped --instance-ids ${{ secrets.EC2_INSTANCE_ID }}