agents: Update rules

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Author: patrickelectric

AGENTS.md

@@ -46,6 +46,8 @@ When writing code:
 - No docstrings unless the function is non-obvious
 - No comments unless explaining "why", never "what"
 - Prefer editing existing files over creating new ones
+- Use optional chaining (`?.`) when possible in typescript
+- Use `v-tooltip` over `title` in vue2 components
 
 When explaining:
 - Be concise and direct
@@ -76,6 +78,8 @@ gh pr diff <number> --repo bluerobotics/BlueOS
 gh issue list --repo bluerobotics/BlueOS
 ```
 
+### 3. Use yarn over npm
+
 ## Creating a New Service
 
 **Reference implementation:** [PR #3669](https://github.com/bluerobotics/BlueOS/pull/3669) (disk_usage service)