Initial commit: Shelly Manager with Textual CLI, Streamlit UI, and comprehensive .gitignore

Shelly device management app with mDNS/subnet discovery, inventory,
configuration, and mass operations for Gen1/Gen2+ devices.

Includes .gitignore excluding runtime data (device DB, user config),
AI conversation history, build artifacts, and common Python/OS patterns.

skills-lock.json

@@ -0,0 +1,10 @@
+{
+  "version": 1,
+  "skills": {
+    "developing-with-streamlit": {
+      "source": "streamlit/agent-skills",
+      "sourceType": "github",
+      "computedHash": "d366960761de1ec907dee42ddbdc08b9c868584cebc8c9fe8e0efdccb4bc5db7"
+    }
+  }
+}