Add progress bars on Vue Nodes (#5469)

* track execution progress in vue nodes

* add test

* remove pointless execution state test

The test was mocking everything including the provide/inject mechanism,
so it wasn't testing real behavior. The execution progress feature
works correctly as verified through manual testing.

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Co-Authored-By: Claude <noreply@anthropic.com>

* remove accidentally committed PR_TEMPLATE.md

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Co-Authored-By: Claude <noreply@anthropic.com>

* [refactor] address PR review feedback from @DrJKL

- Replace hardcoded #0B8CE9 color with blue-100 class for consistency
- Replace magic number 56px with top-14 class for progress bar positioning
- Use storeToRefs() for better Pinia reactivity
- Reduce heavy commenting per maintainer preference

* fix: update LGraphNode test to mock useNodeExecutionState properly

The test was failing because it passed executing as a prop, but the component
uses the useNodeExecutionState composable. Added proper mock for the composable
to test the animate-pulse class application during execution.

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Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/stores/executionStore.ts

@@ -132,7 +132,7 @@ export const useExecutionStore = defineStore('execution', () => {
 
   // Easily access all currently executing node IDs
   const executingNodeIds = computed<NodeId[]>(() => {
-    return Object.entries(nodeProgressStates)
+    return Object.entries(nodeProgressStates.value)
       .filter(([_, state]) => state.state === 'running')
       .map(([nodeId, _]) => nodeId)
   })