AUFGERAUMT: Root auf 10 sichtbare Elemente reduziert

Der Nutzer hat recht: Der Ordner war voller Entwicklungs-Muell.
Jetzt ist sauber getrennt:

ROOT (was der Nutzer sieht und braucht):
- run.py                     = das Programm
- hms_app/                   = der Anwendungscode
- HMS MediaEngine.app        = macOS Doppelklick-Starter
- HMS-Start.vbs              = Windows Doppelklick-Starter
- HMS-Install.vbs             = Windows Erst-Installation
- HMS-Mac-Install.command     = macOS Homebrew-Installation
- HMS-Portable-Install.command = macOS Portable-Installation (16GB-Fix)
- installer_gui.py           = grafischer Installer
- launcher.pyw + launcher_core.py = interne Start-Logik
- LIESMICH.txt               = 10-Zeilen-Kurzanleitung
- .gitignore

_entwicklung/ (alles andere, NICHT benoetigt):
- packages/ apps/ native/ plugins/ tools/ schemas/ tests/ docs/
  build/ fixture_profiles/
- PLAN.md STATUS.md ERRORS.md TEST_REPORT.md CHANGELOG.md README.md
- pyproject.toml uv.lock setup_*.sh/ps1 make_mac_app.py

Diese Trennung gilt ab sofort fuer alle Commits. Der Nutzer kann
_entwicklung/ loeschen wenn er Platz braucht - die App laeuft ohne.

Verifiziert: App startet nach Aufraeumen unveraendert (Health 200).

_entwicklung/pyproject.toml

@@ -0,0 +1,53 @@
+[project]
+name = "hms-mediaengine"
+version = "0.1.0"
+description = "HMS MediaEngine – modularer Medienserver, VJ-System und generativer Effektserver (Arbeitstitel)"
+requires-python = "==3.13.*"
+dependencies = [
+    "fastapi>=0.115",
+    "uvicorn>=0.30",
+    "pydantic>=2.7",
+    "msgpack>=1.0",
+    "python-multipart>=0.0.32",
+]
+
+[dependency-groups]
+dev = [
+    "pytest>=8.2",
+    "httpx>=0.27",
+    "ruff>=0.6",
+]
+
+[build-system]
+requires = ["hatchling>=1.22"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = [
+    "packages/protocol/hms_protocol",
+    "packages/domain/hms_domain",
+    "packages/parameter_engine/hms_parameter",
+    "packages/artnet/hms_artnet",
+    "packages/adaptive_quality/hms_adaptive",
+    "packages/capabilities/hms_capabilities",
+    "packages/plugin_sdk/hms_plugin_sdk",
+    "packages/persistence/hms_persistence",
+    "packages/cluster/hms_cluster",
+    "packages/media/hms_media",
+    "packages/content_sync/hms_content_sync",
+    "packages/audio_analysis/hms_audio",
+    "apps/renderer/hms_renderer",
+    "apps/control_server/hms_control_server",
+    "apps/launcher/hms_launcher",
+]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+addopts = "-q"
+
+[tool.ruff]
+line-length = 100
+target-version = "py313"
+
+[tool.ruff.lint]
+select = ["E", "F", "W", "I", "UP", "B"]