chore: Simplify extension dependency injection

- Has better typing
- Removes use of unnusual unique symbol
- Fix welcome banner tests
    - Update associated snapshots
- Start converting custom column tests to use ApplicationBuilder
- Remove old and unnused RecursiveTreeView
- Introduce new TreeView for use in CatalogMenu to fix tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/features/application-menu/main/application-menu-item-registrator.injectable.ts

@@ -6,7 +6,6 @@ import { computed } from "mobx";
 import type { Injectable } from "@ogre-tools/injectable";
 import { getInjectable } from "@ogre-tools/injectable";
 import { extensionRegistratorInjectionToken } from "../../../extensions/extension-loader/extension-registrator-injection-token";
-import type { LensExtension } from "../../../extensions/lens-extension";
 import type { LensMainExtension } from "../../../extensions/lens-main-extension";
 import type {
   ApplicationMenuItemTypes,
@@ -25,7 +24,7 @@ const applicationMenuItemRegistratorInjectable = getInjectable({
     const logError = di.inject(logErrorInjectable);
     const toRecursedInjectables = toRecursedInjectablesFor(logError);
 
-    return (ext: LensExtension) => {
+    return (ext) => {
       const mainExtension = ext as LensMainExtension;
 
       return computed(() => {