feat(cli): add inkreach-teable plugin commands

plugin list: list registered plugins (id/name/status/runtimeType)
plugin register: register by URL (--name --url --positions)
plugin config list: list base configs (pluginId/tableId/enabled/form/write)
plugin config enable/disable: enable/disable per table or base-wide

Added 5 client methods: getPlugins, registerPlugin, listPluginConfigs,
upsertPluginConfig for CRUD.

src/lib/client.ts

@@ -224,6 +224,20 @@ export class Client {
   sql(baseId: string, sql: string) {
     return this.call<unknown[]>('POST', `/api/base/${baseId}/sql`, { sql });
   }
+
+  // ---- plugin ----
+  getPlugins() {
+    return this.call<unknown[]>('GET', '/api/plugin');
+  }
+  registerPlugin(body: Record<string, unknown>) {
+    return this.call<unknown>('POST', '/api/plugin', body);
+  }
+  listPluginConfigs(baseId: string) {
+    return this.call<unknown[]>('GET', `/api/base/${baseId}/plugin-config`);
+  }
+  upsertPluginConfig(baseId: string, pluginId: string, body: Record<string, unknown>) {
+    return this.call<unknown>('PUT', `/api/base/${baseId}/plugin-config/${pluginId}`, body);
+  }
 }
 
 // ---- shared types (mirror backend workflow_node / workflow_edge shapes) ----