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.

.agents/skills/developing-with-streamlit/templates/themes/_configs/snowflake.toml

@@ -0,0 +1,42 @@
+# Snowflake Theme for Streamlit
+# The Data Cloud company aesthetic - clean, professional, icy blue branding
+[theme]
+primaryColor = "#29B5E8"
+backgroundColor = "#ffffff"
+secondaryBackgroundColor = "#f4f9fc"
+codeBackgroundColor = "#e8f4f8"
+textColor = "#11567F"
+linkColor = "#29B5E8"
+borderColor = "#d0e8f2"
+showWidgetBorder = true
+showSidebarBorder = true
+baseRadius = "8px"
+buttonRadius = "8px"
+font = "Inter:https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap"
+codeFont = "'JetBrains Mono':https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap"
+codeFontSize = "13px"
+codeTextColor = "#11567F"
+baseFontSize = 14
+baseFontWeight = 400
+headingFontSizes = ["32px", "24px", "20px", "16px", "14px", "12px"]
+headingFontWeights = [600, 600, 600, 500, 500, 500]
+linkUnderline = false
+chartCategoricalColors = ["#29B5E8", "#FF8B00", "#36B37E", "#6554C0", "#DE350B", "#11567F", "#FFAB00", "#00A3BF"]
+
+# Snowflake color palette
+blueColor = "#29B5E8"
+greenColor = "#36B37E"
+yellowColor = "#FFAB00"
+orangeColor = "#FF8B00"
+redColor = "#DE350B"
+violetColor = "#6554C0"
+
+dataframeBorderColor = "#d0e8f2"
+dataframeHeaderBackgroundColor = "#e8f4f8"
+
+[theme.sidebar]
+backgroundColor = "#11567F"
+secondaryBackgroundColor = "#174D6A"
+codeBackgroundColor = "#0E4D6B"
+textColor = "#ffffff"
+borderColor = "#1E6D94"