Add tech-writers as default codeowners (#1815)

Author: alexandratran

.github/CODEOWNERS

@@ -2,22 +2,7 @@
 # so the listed codeowners apply only if there is no later match.
 
 # Default owner for all other files
-* @MetaMask/activation
-
-# Docusaurus configuration
-docusaurus.config.js @MetaMask/activation @MetaMask/tech-writers
-
-# GitHub workflows and templates
-/.github/ @MetaMask/activation @MetaMask/tech-writers
-
-# Static image and video files
-/static/ @MetaMask/activation @MetaMask/tech-writers
-
-# Vercel configuration
-vercel.json @MetaMask/activation @MetaMask/tech-writers
-
-# Sidebar files
-*-sidebar.js @MetaMask/activation @MetaMask/tech-writers
+* @MetaMask/activation @MetaMask/tech-writers
 
 # All other Markdown files
 *.md @MetaMask/tech-writers