feat: expand to 339+ curated skills (v0.3.0)

- Added 175 new high-quality skills across all categories
- 14 distinct categories: AI, Search, Productivity, Dev, Marketing, Media, Finance, Communication, Smart Home, Memory, Security, Data, Social, Other
- Updated all language READMEs and SKILL.md
- Weekly update by MyClaw.ai

skills/calendar/.clawhub/origin.json

@@ -0,0 +1,7 @@
+{
+  "version": 1,
+  "registry": "https://clawhub.ai",
+  "slug": "calendar",
+  "installedVersion": "1.0.0",
+  "installedAt": 1773229764192
+}

skills/calendar/SKILL.md

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+---
+name: calendar
+description: Calendar management and scheduling. Create events, manage meetings, and sync across calendar providers.
+metadata: {"clawdbot":{"emoji":"📅","requires":{"bins":["curl","jq"]}}}
+---
+
+# Calendar 📅
+
+Calendar and scheduling management.
+
+## Features
+
+- Create events
+- Schedule meetings
+- Set reminders
+- View availability
+- Recurring events
+- Calendar sync
+
+## Supported Providers
+
+- Google Calendar
+- Apple Calendar
+- Outlook Calendar
+
+## Usage Examples
+
+```
+"Schedule meeting tomorrow at 2pm"
+"Show my calendar for this week"
+"Find free time for a 1-hour meeting"
+```

skills/calendar/_meta.json

@@ -0,0 +1,6 @@
+{
+  "ownerId": "kn72dx5ngyt147nvk6j9bgj42n80ra91",
+  "slug": "calendar",
+  "version": "1.0.0",
+  "publishedAt": 1771427803561
+}