fix: don't consider text nodes with blank lines as completely empty

[rChaoz]

Changes Overview

Closes #6436

Implementation Approach

Testing Done

Verification Steps

This work well with code blocks. Create an editor with a codeblock and type in some text that contains a blank line, e.g.

abc

123

and call isNodeEmpty() on it. It incorrectly returns true, with this PR it returns false.

Additional Notes

Checklist

• [x] I have created a changeset for this PR if necessary.
• [x] My changes do not break the library.
• [x] I have added tests where applicable.
• [x] I have followed the project guidelines.
• [x] I have fixed any lint issues.

Related Issues

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: bf01f376f8f4e1ca3232eeb3b156522a98e341e3

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

This PR includes changesets to release 54 packages

Name	Type
@tiptap/core	Patch
@tiptap/extension-blockquote	Patch
@tiptap/extension-bold	Patch
@tiptap/extension-bubble-menu	Patch
@tiptap/extension-bullet-list	Patch
@tiptap/extension-character-count	Patch
@tiptap/extension-code-block-lowlight	Patch
@tiptap/extension-code-block	Patch
@tiptap/extension-code	Patch
@tiptap/extension-collaboration-cursor	Patch
@tiptap/extension-collaboration	Patch
@tiptap/extension-color	Patch
@tiptap/extension-document	Patch
@tiptap/extension-dropcursor	Patch
@tiptap/extension-floating-menu	Patch
@tiptap/extension-focus	Patch
@tiptap/extension-font-family	Patch
@tiptap/extension-gapcursor	Patch
@tiptap/extension-hard-break	Patch
@tiptap/extension-heading	Patch
@tiptap/extension-highlight	Patch
@tiptap/extension-history	Patch
@tiptap/extension-horizontal-rule	Patch
@tiptap/extension-image	Patch
@tiptap/extension-italic	Patch
@tiptap/extension-link	Patch
@tiptap/extension-list-item	Patch
@tiptap/extension-list-keymap	Patch
@tiptap/extension-mention	Patch
@tiptap/extension-ordered-list	Patch
@tiptap/extension-paragraph	Patch
@tiptap/extension-placeholder	Patch
@tiptap/extension-strike	Patch
@tiptap/extension-subscript	Patch
@tiptap/extension-superscript	Patch
@tiptap/extension-table-cell	Patch
@tiptap/extension-table-header	Patch
@tiptap/extension-table-row	Patch
@tiptap/extension-table	Patch
@tiptap/extension-task-item	Patch
@tiptap/extension-task-list	Patch
@tiptap/extension-text-align	Patch
@tiptap/extension-text-style	Patch
@tiptap/extension-text	Patch
@tiptap/extension-typography	Patch
@tiptap/extension-underline	Patch
@tiptap/extension-youtube	Patch
@tiptap/html	Patch
@tiptap/pm	Patch
@tiptap/react	Patch
@tiptap/starter-kit	Patch
@tiptap/suggestion	Patch
@tiptap/vue-2	Patch
@tiptap/vue-3	Patch

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