sub-issue of #10698 according to @sholderbach
(Description largely edited, since the scope of the PR changed)
# Description
Context: `ShellError::OnlySupportsThisInputType` was a duplicate of
`ShellError::PipelineMismatch`
so I
- replaced some occurences of PipelineMismatch by
OnlySupportsThisInputType
For another PR
- replace the remaining occurences
- removed OnlySupportsThisInputType from nu-protocol
# User-Facing Changes
The error message will be different -> but consistent
# Tests + Formatting
OK
# After Submitting
Nothing required
Came from [this
discussion](https://discord.com/channels/601130461678272522/1348791953784836147/1349699872059691038)
on discord with @fdncred
# Description
Small refactoring where I rename commands from "SubCommand" to its
proper name. Motivations: better clarity (although subjective), better
searchable, consistency.
The only commands I didn't touch were "split list" and "ansi gradient"
because of name clashes.
# User-Facing Changes
None
# Tests + Formatting
cargo fmt and clippy OK
# After Submitting
nothing required
# Description
Remove usages of `internal_span` in matches and initializers. I think
this should be the last of the usages, meaning `internal_span` can
finally be refactored out of `Value`(!?)
this PR should close#12168
# Description
Add `split cell-path`, inverse of `into cell-path`.
# User-Facing Changes
Currently there is no way to make use of cell-path values as a user,
other than passing them to builtin commands. This PR makes more use
cases possible.
