docs: update remaining clawdbot/moltbot references to openclaw

- .pre-commit-config.yaml: update comment header
- AGENTS.md: update plugin-sdk import path and state directory paths
- skills/bluebubbles/SKILL.md: update plugin-sdk import reference
- skills/discord/SKILL.md: update example sticker name

.pre-commit-config.yaml

@@ -1,4 +1,4 @@
-# Pre-commit hooks for clawdbot
+# Pre-commit hooks for openclaw
 # Install: prek install
 # Run manually: prek run --all-files
 #

skills/discord/SKILL.md

@@ -84,7 +84,7 @@ Message context lines include `discord message id` and `channel` fields you can
 {
   "action": "stickerUpload",
   "guildId": "999",
-  "name": "moltbot_wave",
+  "name": "openclaw_wave",
   "description": "OpenClaw waving hello",
   "tags": "👋",
   "mediaUrl": "file:///tmp/wave.png"