feat(plugins): add memory slot plugin

src/config/types.plugins.ts

@@ -3,6 +3,11 @@ export type PluginEntryConfig = {
   config?: Record<string, unknown>;
 };
 
+export type PluginSlotsConfig = {
+  /** Select which plugin owns the memory slot ("none" disables memory plugins). */
+  memory?: string;
+};
+
 export type PluginsLoadConfig = {
   /** Additional plugin/extension paths to load. */
   paths?: string[];
@@ -25,6 +30,7 @@ export type PluginsConfig = {
   /** Optional plugin denylist (plugin ids). */
   deny?: string[];
   load?: PluginsLoadConfig;
+  slots?: PluginSlotsConfig;
   entries?: Record<string, PluginEntryConfig>;
   installs?: Record<string, PluginInstallRecord>;
 };