Remove .claude folder and add to gitignore

- Remove Claude Code settings from repository
- Add .claude/ to gitignore to prevent future commits
- Add Adafruit Unified Sensor dependency for CI builds

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.local.json

@@ -1,16 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(arduino-cli lib examples:*)",
-      "Bash(arduino-cli compile:*)",
-      "Bash(arduino-cli upload:*)",
-      "Bash(arduino-cli board:*)",
-      "Bash(git init:*)",
-      "WebFetch(domain:raw.githubusercontent.com)",
-      "Bash(\"/c/Program Files/TortoiseGit/bin/puttygen\" \"C:\\Users\\ladyada\\Dropbox\\shared\\github.ppk\" -O private-openssh -o ~/.ssh/id_rsa)",
-      "Bash(python3:*)"
-    ],
-    "deny": [],
-    "ask": []
-  }
-}

.gitignore

@@ -55,3 +55,4 @@ output.txt
 
 # Claude Code development files
 CLAUDE.md
+.claude/