revset: add function mine()

[emilykfox]

mine() is an alias for author([user.name]) per the specification given in #1976, although I wonder if it should instead act like author([user.name]) | author([user.email]).

Checklist

If applicable:

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

[martinvonz]

I wonder if it should instead act like author([user.name]) | author([user.email]).

I would probably go with using only the email. That avoids problems with non-unique names.

[martinvonz]

Thanks!

We generally include documentation with the code changes, so please squash the three commits into one. One exception is if we don't want users to know about the change until it's reached a released version. In such cases, it would be a whole separate PR, however. See some more discussion in https://github.com/martinvonz/jj/blob/main/docs/contributing.md#code-reviews.

[martinvonz]

Thanks again. Feel free to merge when the checks pass.

[emilykfox]

Thanks!

We generally include documentation with the code changes, so please squash the three commits into one. One exception is if we don't want users to know about the change until it's reached a released version. In such cases, it would be a whole separate PR, however. See some more discussion in https://github.com/martinvonz/jj/blob/main/docs/contributing.md#code-reviews.

I squashed the three commits into one.