chore: Move editor into codebase (#2930)

shared/editor/nodes/Node.ts

@@ -0,0 +1,47 @@
+import { InputRule } from "prosemirror-inputrules";
+import { TokenConfig } from "prosemirror-markdown";
+import {
+  Node as ProsemirrorNode,
+  NodeSpec,
+  NodeType,
+  Schema,
+} from "prosemirror-model";
+import Extension, { Command, CommandFactory } from "../lib/Extension";
+import { MarkdownSerializerState } from "../lib/markdown/serializer";
+
+export default abstract class Node extends Extension {
+  get type() {
+    return "node";
+  }
+
+  get schema(): NodeSpec {
+    return {};
+  }
+
+  get markdownToken(): string {
+    return "";
+  }
+
+  inputRules(_options: { type: NodeType; schema: Schema }): InputRule[] {
+    return [];
+  }
+
+  keys(_options: { type: NodeType; schema: Schema }): Record<string, Command> {
+    return {};
+  }
+
+  commands(_options: {
+    type: NodeType;
+    schema: Schema;
+  }): Record<string, CommandFactory> | CommandFactory {
+    return {};
+  }
+
+  toMarkdown(state: MarkdownSerializerState, node: ProsemirrorNode): void {
+    console.error("toMarkdown not implemented", state, node);
+  }
+
+  parseMarkdown(): TokenConfig | void {
+    return undefined;
+  }
+}