Revert "Revert "feat(@lexical/devtools): Added TreeView rendering ins…

…tead of a simple textarea"" (#5864)

.flowconfig

@@ -21,6 +21,7 @@ exact_by_default=true
 module.name_mapper='^lexical$' -> '<PROJECT_ROOT>/packages/lexical/flow/Lexical.js.flow'
 
 module.name_mapper='^@lexical/clipboard' -> '<PROJECT_ROOT>/packages/lexical-clipboard/flow/LexicalClipboard.js.flow'
+module.name_mapper='^@lexical/devtools-core' -> '<PROJECT_ROOT>/packages/devtools-core/flow/LexicalDevToolsCore.js.flow'
 module.name_mapper='^@lexical/list' -> '<PROJECT_ROOT>/packages/lexical-list/flow/LexicalList.js.flow'
 module.name_mapper='^@lexical/table' -> '<PROJECT_ROOT>/packages/lexical-table/flow/LexicalTable.js.flow'
 module.name_mapper='^@lexical/file' -> '<PROJECT_ROOT>/packages/lexical-file/flow/LexicalFile.js.flow'
@@ -125,4 +126,4 @@ nonstrict-import
 unclear-type
 
 [version]
-^0.226.0
+^0.226.0

jest.config.js

@@ -29,6 +29,8 @@ module.exports = {
         '^@lexical/clipboard$':
           '<rootDir>/packages/lexical-clipboard/src/index.ts',
         '^@lexical/code$': '<rootDir>/packages/lexical-code/src/index.ts',
+        '^@lexical/devtools-core$':
+          '<rootDir>/packages/lexical-devools-core/src/index.ts',
         '^@lexical/dragon$': '<rootDir>/packages/lexical-dragon/src/index.ts',
         '^@lexical/file$': '<rootDir>/packages/lexical-file/src/index.ts',
         '^@lexical/hashtag$': '<rootDir>/packages/lexical-hashtag/src/index.ts',

packages/lexical-devtools-core/LexicalDevtoolsCore.js

@@ -0,0 +1,11 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+'use strict';
+
+module.exports = require('./dist/LexicalDevtoolsCore.js');

packages/lexical-devtools-core/README.md

@@ -0,0 +1,5 @@
+# `@lexical/devtools-core`
+
+[![See API Documentation](https://lexical.dev/img/see-api-documentation.svg)](https://lexical.dev/docs/api/modules/lexical_devtools-core)
+
+This package contains tools necessary to debug and develop Lexical.

packages/lexical-devtools-core/flow/LexicalDevtoolsCore.js.flow

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */