refactor: bashrc is always sourced after tool install automatically

- Added source_bashrc funciton in shell_confi.sh
- Removed bashrc source commands from installer scripts
- Updated skill instructions

installers/install_pnpm.sh

@@ -218,7 +218,6 @@ main() {
         log_info "Installed pnpm version: $(pnpm --version 2>/dev/null || echo 'unknown')"
     else
         log_success "Installation complete."
-        log_info "Please close and reopen your terminal or run: source ~/.bashrc to verify."
     fi
 }