fix(chunk): add virt_text_repeat_linebreak to fix holes on wrapped lines

[parkers0405]

Summary

Fixes chunk indicator gaps/holes when lines are soft-wrapped.

Problem

When wrap is enabled, the vertical chunk indicator │ shows gaps on wrapped line continuations:

This happens because the virtual text overlay doesn't repeat on soft line breaks by default.

Solution

Add virt_text_repeat_linebreak = true to the extmark options in row_opts. This tells Neovim to repeat the virtual text on soft-wrapped line continuations.

See: https://neovim.io/doc/user/api.html#nvim_buf_set_extmark()

virt_text_repeat_linebreak: if true, the virtual text will be repeated on wrapped lines

Credits

• Thanks to @jas0xf for identifying the solution in Wrapped Line virtural text consistency #136
• Thanks to @knevan for reporting in Chunk doesnt render correctly #161

Fixes #136
Fixes #161

[Copilot]

Pull request overview

Fixes chunk indicator gaps when wrap is enabled by ensuring the virtual text used for the vertical chunk guide is repeated across soft-wrapped screen lines.

Changes:

• Set virt_text_repeat_linebreak = true in the extmark options used by the chunk renderer to avoid holes on wrapped-line continuations.

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