Refactor DI for simplicity and type safety

This commit improves the dependency injection mechanism by introducing a
custom `injectKey` function.

Key improvements are:

- Enforced type consistency during dependency registration and
  instantiation.
- Simplified injection process, abstracting away the complexity with a
  uniform API, regardless of the dependency's lifetime.
- Eliminated the possibility of `undefined` returns during dependency
  injection, promoting fail-fast behavior.
- Removed the necessity for type casting to `symbol` for injection keys
  in unit tests by using existing types.
- Consalidated imports, combining keys and injection functions in one
  `import` statement.

tests/unit/presentation/components/Scripts/View/Tree/TreeView/Node/UseNodeState.spec.ts

@@ -79,7 +79,7 @@ function mountWrapperComponent(nodeWatcher: WatchSource<ReadOnlyTreeNode | undef
     {
       global: {
         provide: {
-          [InjectionKeys.useAutoUnsubscribedEvents as symbol]:
+          [InjectionKeys.useAutoUnsubscribedEvents.key]:
             () => new UseAutoUnsubscribedEventsStub().get(),
         },
       },

tests/unit/presentation/components/Scripts/View/Tree/TreeView/UseCurrentTreeNodes.spec.ts

@@ -70,7 +70,7 @@ function mountWrapperComponent(treeWatcher: WatchSource<TreeRoot | undefined>) {
     {
       global: {
         provide: {
-          [InjectionKeys.useAutoUnsubscribedEvents as symbol]:
+          [InjectionKeys.useAutoUnsubscribedEvents.key]:
             () => new UseAutoUnsubscribedEventsStub().get(),
         },
       },

tests/unit/presentation/components/Scripts/View/Tree/TreeView/UseNodeStateChangeAggregator.spec.ts

@@ -336,7 +336,7 @@ class UseNodeStateChangeAggregatorBuilder {
       {
         global: {
           provide: {
-            [InjectionKeys.useAutoUnsubscribedEvents as symbol]:
+            [InjectionKeys.useAutoUnsubscribedEvents.key]:
               () => this.events.get(),
           },
         },

tests/unit/presentation/components/Scripts/View/Tree/TreeViewAdapter/UseCollectionSelectionStateUpdater.spec.ts

@@ -172,7 +172,7 @@ function mountWrapperComponent() {
   }, {
     global: {
       provide: {
-        [InjectionKeys.useCollectionState as symbol]: () => useStateStub.get(),
+        [InjectionKeys.useCollectionState.key]: () => useStateStub.get(),
       },
     },
   });

tests/unit/presentation/components/Scripts/View/Tree/TreeViewAdapter/UseSelectedScriptNodeIds.spec.ts

@@ -239,9 +239,9 @@ function mountWrapperComponent(scenario?: {
   }, {
     global: {
       provide: {
-        [InjectionKeys.useCollectionState as symbol]:
+        [InjectionKeys.useCollectionState.key]:
           () => useStateStub.get(),
-        [InjectionKeys.useAutoUnsubscribedEvents as symbol]:
+        [InjectionKeys.useAutoUnsubscribedEvents.key]:
           () => (scenario?.useAutoUnsubscribedEvents ?? new UseAutoUnsubscribedEventsStub()).get(),
       },
     },

tests/unit/presentation/components/Scripts/View/Tree/TreeViewAdapter/UseTreeViewFilterEvent.spec.ts

@@ -148,9 +148,9 @@ function mountWrapperComponent(options?: {
   }, {
     global: {
       provide: {
-        [InjectionKeys.useCollectionState as symbol]:
+        [InjectionKeys.useCollectionState.key]:
           () => useStateStub.get(),
-        [InjectionKeys.useAutoUnsubscribedEvents as symbol]:
+        [InjectionKeys.useAutoUnsubscribedEvents.key]:
           () => new UseAutoUnsubscribedEventsStub().get(),
       },
     },

tests/unit/presentation/components/Scripts/View/Tree/TreeViewAdapter/UseTreeViewNodeInput.spec.ts

@@ -106,7 +106,7 @@ function mountWrapperComponent(categoryIdWatcher: WatchSource<number | undefined
   }, {
     global: {
       provide: {
-        [InjectionKeys.useCollectionState as symbol]: () => useStateStub.get(),
+        [InjectionKeys.useCollectionState.key]: () => useStateStub.get(),
       },
     },
   });