core: add function cleanup_lxc

Introduces the cleanup_lxc function to perform system and package manager cache cleanup, remove temporary files, truncate logs, and clear caches for various language package managers. This helps ensure containers are left in a clean state after operations.

misc/core.func

@@ -368,6 +368,53 @@ run_container_safe() {
   " || __handle_general_error "lxc-attach to CT $ct"
 }
 
+cleanup_lxc() {
+  msg_info "Cleaning up"
+
+  if is_alpine; then
+    $STD apk cache clean || true
+    rm -rf /var/cache/apk/*
+  else
+    $STD apt -y autoremove || true
+    $STD apt -y autoclean || true
+    $STD apt -y clean || true
+  fi
+
+  rm -rf /tmp/* /var/tmp/*
+
+  # Remove temp files created by mktemp/tempfile
+  find /tmp /var/tmp -type f -name 'tmp*' -delete 2>/dev/null || true
+  find /tmp /var/tmp -type f -name 'tempfile*' -delete 2>/dev/null || true
+
+  find /var/log -type f -exec truncate -s 0 {} +
+
+  # Python pip
+  if command -v pip &>/dev/null; then pip cache purge || true; fi
+  # Python uv
+  if command -v uv &>/dev/null; then uv cache clear || true; fi
+  # Node.js npm
+  if command -v npm &>/dev/null; then npm cache clean --force || true; fi
+  # Node.js yarn
+  if command -v yarn &>/dev/null; then yarn cache clean || true; fi
+  # Node.js pnpm
+  if command -v pnpm &>/dev/null; then pnpm store prune || true; fi
+  # Go
+  if command -v go &>/dev/null; then go clean -cache -modcache || true; fi
+  # Rust cargo
+  if command -v cargo &>/dev/null; then cargo clean || true; fi
+  # Ruby gem
+  if command -v gem &>/dev/null; then gem cleanup || true; fi
+  # Composer (PHP)
+  if command -v composer &>/dev/null; then composer clear-cache || true; fi
+
+  if command -v journalctl &>/dev/null; then
+    journalctl --rotate
+    journalctl --vacuum-time=10m
+  fi
+
+  msg_ok "Cleaned"
+}
+
 check_or_create_swap() {
   msg_info "Checking for active swap"