This PR fixes an issue with `explore` where you can "drill down" into
the same value forever. For example:
1. Run `ls | explore`
2. Press Enter to enter cursor mode
3. Press Enter again to open the selected string in a new layer
4. Press Enter again to open that string in a new layer
5. Press Enter again to open that string in a new layer
6. Repeat and eventually you have a bajillion layers open with the same
string
IMO it only makes sense to "drill down" into lists and records.
In a separate commit I also did a little refactoring, cleaning up naming
and comments.
Could be improved further I guess; but not here;
You can test the speed differences using data from #13088
```nu
open data.db | get profiles | explore
```
address: #13062
________
1. Noticed that search does not work anymore (even on `main` branch).
2. Not sure about resolved merged conflicts, seems fine, but maybe
something was lost.
---------
Co-authored-by: Reilly Wood <reilly.wood@icloud.com>
Configuration in `explore` has always been confusing to me. This PR
overhauls (and simplifies, I think) how configuration is done.
# Details
1. Configuration is now strongly typed. In `Explore::run()` we create an
`ExploreConfig` struct from the more general Nu configuration and
arguments to `explore`, then pass that struct to other parts of
`explore` that need configuration. IMO this is a lot easier to reason
about and trace than the previous approach of creating a
`HashMap<String, Value>` and then using that to make various structs
elsewhere.
2. We now inherit more configuration from the config used for regular Nu
tables
1. Border/line styling now uses the `separator` style used for regular
Nu tables, the special `explore.split_line` config point has been
retired.
2. Cell padding in tables is now controlled by `table.padding` instead
of the undocumented `column_padding_left`/`column_padding_right` config
3. The (optional, previously not enabled by default) `selected_row` and
`selected_column` configuration has been removed. We now only highlight
the selected cell. I could re-add this if people really like the feature
but I'm guessing nobody uses it.
The interface still looks the same with a default/empty config.nu:
