feat(editor): Add new /templates/search endpoint (#8227)

Updating n8n front-end to use the new search endpoint powered by TypeSense.

Endpoint is deployed on staging API so, in order to test it, use this env var:
```export N8N_TEMPLATES_HOST=https://api-staging.n8n.io/api```

**NOTE**: This PR should not be merged until [backend changes](https://github.com/n8n-io/creators-site/pull/118) are merged and released.

## Related tickets and issues
https://linear.app/n8n/issue/ADO-1555/update-in-app-search-to-work-with-the-new-back-end


## Review / Merge checklist
- [x] PR title and summary are descriptive. **Remember, the title automatically goes into the changelog. Use `(no-changelog)` otherwise.** ([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))
- [ ] Tests included.
   > A bug is not considered fixed, unless a test is added to prevent it from happening again.
   > A feature is not complete without tests.

packages/editor-ui/src/components/TemplateList.vue

@@ -3,6 +3,7 @@
 		<div v-if="!simpleView" :class="$style.header">
 			<n8n-heading :bold="true" size="medium" color="text-light">
 				{{ $locale.baseText('templates.workflows') }}
+				<span v-if="totalCount > 0" data-test-id="template-count-label">({{ totalCount }})</span>
 				<span v-if="!loading && totalWorkflows" v-text="`(${totalWorkflows})`" />
 			</n8n-heading>
 		</div>
@@ -19,7 +20,7 @@
 				@useWorkflow="(e) => onUseWorkflow(e, workflow.id)"
 			/>
 			<div v-if="infiniteScrollEnabled" ref="loader" />
-			<div v-if="loading">
+			<div v-if="loading" data-test-id="templates-loading-container">
 				<TemplateCard
 					v-for="n in 4"
 					:key="'index-' + n"
@@ -55,14 +56,20 @@ export default defineComponent({
 		},
 		workflows: {
 			type: Array,
+			default: () => [],
 		},
 		totalWorkflows: {
 			type: Number,
+			default: 0,
 		},
 		simpleView: {
 			type: Boolean,
 			default: false,
 		},
+		totalCount: {
+			type: Number,
+			default: 0,
+		},
 	},
 	mounted() {
 		if (this.infiniteScrollEnabled) {