feat: added native undo feature for editor - #1

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v2, actions/setup-node@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Unexpected nullable string value in conditional. Please handle the nullish/empty cases explicitly

Unexpected value in conditional. A boolean expression is required

Unexpected value in conditional. A boolean expression is required

Unexpected value in conditional. A boolean expression is required

Unexpected value in conditional. A boolean expression is required

Unexpected object value in conditional. The condition is always true

Unexpected object value in conditional. The condition is always true

Unexpected any value in conditional. An explicit comparison or type cast is required

The type 'BlockTool' is undefined