feat: make each plugin an npm workspace built by a termix-plugin CLI

packages/plugin-sdk/cli/lib/externals.mjs

@@ -0,0 +1,48 @@
+/**
+ * Host-provided packages.
+ *
+ * These ship with the Termix server and are never bundled into a plugin:
+ * bundling them would give each plugin its own copy of express or React, and
+ * a second ssh2 would mean a second set of native bindings. A plugin may
+ * depend on anything outside these lists, and that does get bundled.
+ *
+ * Node builtins are external automatically through platform: "node".
+ */
+
+export const BACKEND_EXTERNALS = [
+  "@termix/plugin-sdk",
+  "@termix/plugin-sdk/*",
+  "express",
+  "ssh2",
+  "ws",
+  "multer",
+  "cookie-parser",
+  "axios",
+  "jszip",
+  "guacamole-lite",
+  "@anthropic-ai/sdk",
+  "drizzle-orm",
+  "drizzle-orm/*",
+];
+
+export const FRONTEND_EXTERNALS = [
+  "react",
+  "react-dom",
+  "react/jsx-runtime",
+  "react-dom/client",
+  "@termix/plugin-sdk",
+  "@termix/plugin-sdk/*",
+  "i18next",
+  "react-i18next",
+  // Core-provided UI libraries. A7 serves these through the SDK ui entry.
+  "lucide-react",
+  "sonner",
+  "axios",
+  "cytoscape",
+  "react-cytoscapejs",
+  "guacamole-common-js",
+  "react-xtermjs",
+  "@xterm/*",
+  // Legacy: the shell's own modules, still reached by alias. A7 removes.
+  "@/*",
+];