Add Home Assistant switch, regression tests and ignore rules

.gitignore

@@ -0,0 +1,28 @@
+# Local credentials and configuration
+.env
+.env.*
+!.env.example
+meshcore-phone-mode.ini
+*.local.ini
+*.local.yaml
+*.local.yml
+secrets/
+
+# Python runtime and editor files
+venv/
+.venv/
+__pycache__/
+*.py[cod]
+.pytest_cache/
+.coverage
+.DS_Store
+*.swp
+*.swo
+
+# Runtime data and downloaded distributions
+*.log
+*.db
+*.db-*
+*.sqlite*
+*.tar.gz
+*.zip