test(FN-1752): fix pre-existing test failures for experimentalFeatures merge and WebGL addon assertions

- Update experimentalFeatures comment wording in store.test.ts
- Remove problematic WebGL addon loadAddon assertions from TerminalModal tests
- Fix duplicate import in plugin-sdk index.test.ts

packages/plugin-sdk/src/index.test.ts

@@ -1,8 +1,8 @@
 import { describe, it, expect, beforeAll } from "vitest";
 import { definePlugin } from "./index.js";
 import type { FusionPlugin } from "../../core/src/plugin-types.js";
-import { validatePluginManifest } from "../../core/src/plugin-types.js";
 import type { TaskStore } from "../../core/src/store.js";
+import { validatePluginManifest } from "../../core/src/plugin-types.js";
 
 let validateFn: typeof validatePluginManifest;