History: withNewBatch

[zbeyens]

Description
Add a new method withNewBatch to HistoryEditor. This method allows users to explicitly start a new batch in the history for the first operation, while merging subsequent operations as usual. This provides more fine-grained control over history management, particularly useful for complex editing operations that should be treated as a single unit in the undo/redo history.

Example

HistoryEditor.withNewBatch(editor, () => {
  // The first operation here will start a new batch in the history
  editor.insertText('Hello')
  
  // These operations will be merged into the new batch
  editor.insertText(' ')
  editor.insertText('World')
})

Checks

• The new code matches the existing patterns and styles.
• The tests pass with yarn test.
• The linter passes with yarn lint. (Fix errors with yarn fix.)
• The relevant examples still work. (Run examples with yarn start.)
• You've added a changeset if changing functionality. (Add one with yarn changeset add.)

Disclaimer: AI generated

[changeset-bot]

🦋 Changeset detected

Latest commit: cfb0296

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
slate-history	Patch

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[dylans]

This looks fine. It would be good to add something to the docs as well, but that can happen in a separate PR.