Decouple node help between sidebar and right panel (#8110)

## Summary

When the node library is open and you click on the node toolbar info
button, this causes the node library info panel & right panel node info
to show the same details.

## Changes

- Extract useNodeHelpContent composable so NodeHelpContent fetches its
own content, allowing multiple panels to show help independently
- Remove sync behavior from NodeHelpPage that caused left sidebar to
change when selecting different graph nodes since we want to prioritise
right panel for this behavior
- Add telemetry tracking for node library help button to identify how
frequently this is used

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8110-Decouple-node-help-between-sidebar-and-right-panel-2ea6d73d365081a9b3afd25aa51b34bd)
by [Unito](https://www.unito.io)

src/components/rightSidePanel/info/TabInfo.vue

@@ -1,11 +1,9 @@
 <script setup lang="ts">
-import { whenever } from '@vueuse/core'
 import { computed } from 'vue'
 
 import NodeHelpContent from '@/components/node/NodeHelpContent.vue'
 import type { LGraphNode } from '@/lib/litegraph/src/litegraph'
 import { useNodeDefStore } from '@/stores/nodeDefStore'
-import { useNodeHelpStore } from '@/stores/workspace/nodeHelpStore'
 
 const { nodes } = defineProps<{
   nodes: LGraphNode[]
@@ -13,20 +11,10 @@ const { nodes } = defineProps<{
 const node = computed(() => nodes[0])
 
 const nodeDefStore = useNodeDefStore()
-const nodeHelpStore = useNodeHelpStore()
 
 const nodeInfo = computed(() => {
   return nodeDefStore.fromLGraphNode(node.value)
 })
-
-// Open node help when the selected node changes
-whenever(
-  nodeInfo,
-  (info) => {
-    nodeHelpStore.openHelp(info)
-  },
-  { immediate: true }
-)
 </script>
 
 <template>