DGM20 control for Linux: protocol library, CLI and local web UI

Reverse-engineered from Maono Link 4.0.88 (DGM20_OLD.dll) and verified
against a DGM20 (352f:0105, firmware 2.1.2).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,23 @@
+[build-system]
+requires = ["setuptools>=64"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "dgm20-linux"
+version = "0.1.0"
+description = "Control the Maono DGM20 USB microphone on Linux: noise cancellation, monitoring, vocal enhancement, mute, RGB brightness"
+readme = "README.md"
+license = "MIT"
+requires-python = ">=3.9"
+dependencies = []
+classifiers = ["Operating System :: POSIX :: Linux", "Topic :: Multimedia :: Sound/Audio"]
+
+[project.scripts]
+dgm20ctl = "dgm20.cli:main"
+dgm20-web = "dgm20.web:main"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.package-data]
+dgm20 = ["static/*.html"]