cli: list new remote branches during git fetch

[0xdeafbeef]

Adds imported branches list for git fetch.

jj git fetch
From origin
* [new untracked branch]  test2

Checklist

If applicable:

• I have updated CHANGELOG.md
• I have updated the documentation (README.md, docs/, demos/)
• I have updated the config schema (cli/src/config-schema.json)
• I have added tests to cover my changes

[0xdeafbeef]

I'm not sure what to do with these tests. They are designed to expect no stdout in the event of an error. I can address this issue, but I'm unsure if I should.

[yuja]

I'm not sure what to do with these tests. They are designed to expect no stdout in the event of an error.

Perhaps, the output can be written to stderr. It's kind of a status message.

[0xdeafbeef]

I'm not sure what to do with these tests. They are designed to expect no stdout in the event of an error.

Perhaps, the output can be written to stderr. It's kind of a status message.

I hadn't noticed that 'Abandoned commits' were already being written to stderr. With these changes, all tests now pass.

[yuja]

Thanks!

[0xdeafbeef]

I'm not sure what to do with reference names that are too long. For now, padding is limited to 40 characters; perhaps we should consider using some kind of ellipsis

[martinvonz]

I'm not sure what to do with reference names that are too long. For now, padding is limited to 40 characters; perhaps we should consider using some kind of ellipsis

Seems fine for now. Padding to accommodate the longer name also seems fine.

[0xdeafbeef]

I've added color for branch/tag name, alignment if both tags and branches are present.

[yuja]

Looks mostly good, thanks!

[0xdeafbeef]

@yuja, I've implemented all the suggested changes, and it looks like the PR has received your approval. Unless there are any further comments or adjustments needed, may I proceed with merging it? Thank you for your guidance!