Add development guidelines to CLAUDE.md

Added code style rules, git conventions, and agent tooling
guidelines for better development workflow.

.claude/CLAUDE.md

@@ -1,3 +1,14 @@
-- this script runs in console UI style (ncurses style)
+Code rules
+
+- this script runs in console UI style (ncurses style, using mostly whiptail), for user-interactive parts of code, reuse existing helper functions for prompts and menus
+- for operation feedback, use functions lik ohai or msgok 
 - do not change install.sh file - it is generated from src/lib.sh and src/setup.sh with npm run build command
 - when generating code with command that may output to console, make sure to use convention to add >> "$LOGTO" 2>&1 to capture it into logs and not break UI
+
+GIT Conventions
+
+- make short (2-3 sentences) description for commit messages
+- DO NOT MENTION claude code in commit messages
+
+Agent and tooling rules:
+- do not commit or run build unless asked by user