feat: HTML node (#5107)

* ✨ Create HTML templating node PoC

* ♻️ Apply feedback

* 🐛 Scope CSS selectors

* ✏️ Adjust description

* ✏️ Adjust placeholder

* ⚡ Replace two custom files with package output

* ➕ Add `codemirror-lang-html-n8n`

* 👕 Appease linter

* 🧪 Skip event bus tests

* ⏪ Revert "Skip event bus tests"

This reverts commit 5702585d0de3b8465660567132e9003e78f1104c.

* ✏️ Update codex

* 🧹 Cleanup

* 🐛 Restore original for `continueOnFail`

* ⚡ Improve `getResolvables`

packages/editor-ui/src/mixins/expressionManager.ts

@@ -1,6 +1,6 @@
 import mixins from 'vue-typed-mixins';
 import { mapStores } from 'pinia';
-import { ensureSyntaxTree, syntaxTree } from '@codemirror/language';
+import { ensureSyntaxTree } from '@codemirror/language';
 
 import { workflowHelpers } from '@/mixins/workflowHelpers';
 import { useNDVStore } from '@/stores/ndv';
@@ -9,7 +9,7 @@ import { EXPRESSION_EDITOR_PARSER_TIMEOUT } from '@/constants';
 import type { PropType } from 'vue';
 import type { EditorView } from '@codemirror/view';
 import type { TargetItem } from '@/Interface';
-import type { Plaintext, RawSegment, Resolvable, Segment } from '@/types/expressions';
+import type { Html, Plaintext, RawSegment, Resolvable, Segment } from '@/types/expressions';
 
 export const expressionManager = mixins(workflowHelpers).extend({
 	props: {
@@ -56,6 +56,10 @@ export const expressionManager = mixins(workflowHelpers).extend({
 			return this.segments.filter((s): s is Plaintext => s.kind === 'plaintext');
 		},
 
+		htmlSegments(): Html[] {
+			return this.segments.filter((s): s is Html => s.kind !== 'resolvable');
+		},
+
 		segments(): Segment[] {
 			if (!this.editor) return [];