usb: change api so that every packet sent is crc32c, update python usb api, add automated tests for usb.

.github/workflows/python-usb-export.yml

@@ -0,0 +1,33 @@
+name: USB Export Python Tests
+
+on:
+  push:
+    paths: &python_usb_export_paths
+      - 'tools/test_usb_export.py'
+      - 'tools/usb_export.py'
+      - 'tools/usb_common.py'
+      - 'tools/requirements.txt'
+      - '.github/workflows/python-usb-export.yml'
+  pull_request:
+    paths: *python_usb_export_paths
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r tools/requirements.txt
+
+      - name: Run tests
+        run: |
+          python3 tools/test_usb_export.py

.github/workflows/python-usb-install.yml

@@ -0,0 +1,33 @@
+name: USB Install Python Tests
+
+on:
+  push:
+    paths: &python_usb_install_paths
+      - 'tools/test_usb_install.py'
+      - 'tools/usb_install.py'
+      - 'tools/usb_common.py'
+      - 'tools/requirements.txt'
+      - '.github/workflows/python-usb-install.yml'
+  pull_request:
+    paths: *python_usb_install_paths
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r tools/requirements.txt
+
+      - name: Run tests
+        run: |
+          python3 tools/test_usb_install.py