feat(core): allow nodes and fragments to be inserted into the editor using insertContentAt command #5764

[nperez0111]

Changes Overview

I don't know how this has been missed before. Really easy to support this.

Implementation Approach

Testing Done

Added tests

Verification Steps

Additional Notes

Checklist

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

Related Issues

#5764

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Latest commit: d936f72

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