Add url decode command

[lpchaim]

Implemented URL decoding as a url subcommand, created corresponding unit tests. The logic, examples and descriptions were based on the existing url encode command.

Resolves #10563

Description

Added a new url decode command to compliment the existing url encode, as proposed by myself in #10563.
It takes a string, list of strings or cell path and produces the corresponding decoded strings.

User-Facing Changes

New url subcommand url decode, as described above.

Tests + Formatting

I've added unit tests for the new subcommand and ensured all actions outlined below showed no issues.

• cargo fmt --all -- --check
• cargo clippy --workspace -- -D warnings -D clippy::unwrap_used
• cargo test --workspace
• cargo run -- -c "use std testing; testing run-tests --path crates/nu-std"

[sholderbach]

Thanks for tackling this! Looks like the proper inverse for url encode doing the percent encoding.

Separately we should probably figure out what a good name for from url should be as this doesn't really belong among the file format parsers.

[lpchaim]

Thanks for tackling this! Looks like the proper inverse for url encode doing the percent encoding.

Absolutely, happy to contribute! That's exactly what I had in mind, yes.

Separately we should probably figure out what a good name for from url should be as this doesn't really belong among the file format parsers.

I realize now that my confusion at not being able to find from url among my commands when it was brought up in #10563 was due to it being an extra command, I'd somehow missed they were a thing so far.
Anyway, agreed. Taking a proper look at it, both the logic and code overlap with how url parse parses URL parameters so I feel making it a dedicated url subcommand named url parse-params or similar could work, assuming that's feasible for an extra. I've based the name on usual web API staples such as URLSearchParams so that it hopefully feels familiar to fellow web developers.
I'll give it some more thought and update if anything else comes to mind.

[amtoine]

the code and the examples look good, thanks @lpchaim for making Nushell better 🙏

i propose we leave the renaming of from url to another PR, also because it's an extra command 😉