feat: Added priority and nice as columns in process view

[Saphereye]

Description

This PR adds the Priority and Nice columns to the process table. Both columns for linux and macos, and only priority for windows

Issue

Closes: #1813

Testing

• [ ] Windows
• [ ] macOS
• [X] Linux
• [ ] Other

It was tested on Arch Linux for kernel 6.17.8-arch1-1.

Checklist

• [X] If this is a code change, areas your change affects have been linted using (cargo fmt)
• [X] If this is a code change, your changes pass cargo clippy --all -- -D warnings
• [ ] If this is a code change, new tests were added if relevant
• [X] If this is a code change, your changes pass cargo test
• [ ] The change has been tested to work (see above) and doesn't appear to break other things
• [ ] Documentation has been updated if needed (README.md, help menu, docs, configs, etc.)
• [x] There are no merge conflicts
• [x] You have reviewed the changes first
• [x] The pull request passes the provided CI pipeline

Other

In the htop documentation I found

PRIORITY (PRI)
        The kernel's internal priority for the process, usually just
        its nice value plus twenty. Different for real-time
        processes.

 NICE (NI)
      The nice value of a process, from 19 (low priority) to -20
      (high priority). A high value means the process is being
      nice, letting others have a higher relative priority. The
      usual OS permission restrictions for adjusting priority
      apply.

but I found in /proc/[pid]/stat for a ped pids this relation doesn't hold. Should I keep this or similar to htop for parity?

[codecov[bot]]

Codecov Report

:x: Patch coverage is 51.61290% with 45 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 45.44%. Comparing base (316a3c0) to head (2b32aea).

Files with missing lines	Patch %	Lines
src/widgets/process_table/process_columns.rs	15.38%	22 Missing :warning:
src/widgets/process_table/query.rs	0.00%	15 Missing :warning:
src/widgets/process_table/process_data.rs	28.57%	5 Missing :warning:
src/widgets/process_table.rs	81.81%	2 Missing :warning:
src/collection/processes/unix/process_ext.rs	91.66%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1881      +/-   ##
==========================================
- Coverage   50.46%   45.44%   -5.02%     
==========================================
  Files         115      115              
  Lines       16174    16241      +67     
==========================================
- Hits         8162     7381     -781     
- Misses       8012     8860     +848     

Flag	Coverage Δ
macos-14	42.69% <37.83%> (+<0.01%)	:arrow_up:
ubuntu-latest	43.39% <41.89%> (-5.33%)	:arrow_down:
windows-2022	42.11% <33.96%> (-0.01%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

:rocket: New features to boost your workflow:

• :snowflake: Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[ClementTsang]

Currently taking a look - one thing as a note to myself (so not blocking this PR) - I should add support for searching for this later.

[Saphereye]

Currently taking a look - one thing as a note to myself (so not blocking this PR) - I should add support for searching for this later.

Search for the two columns is currently functional for me:

Should I add any other changes for this?

Also, while I have verified that there are no compile errors on non-Linux platforms (macOS, Windows, and FreeBSD), is there a recommended way to confirm that the feature actually works correctly on those platforms as well?

[ClementTsang]

Search for the two columns is currently functional for me

Oh, nice!

Also to test, it's either testing it manually, or trying to run the code that gets data in a test and seeing if data can get pulled. I plan to add something like that in the future so it's fine for now, I can verify for at least macOS and Windows as part of the review.

[Saphereye]

Hi, I have fixed the compilation errors and made sure it's working on my end. I would require your help to confirm it once on Windows and Mac. Please let me know if I should make any other changes.