feature: allow searching by state, add more keyword variants

[ClementTsang]

Description

A description of the change and what it does. If relevant, please provide screenshots of what results from the change:

Allows searching by state (state = sleep), and adds more keyword variants for searching: cpu%, mem%, r/s, w/s, matching the columns.

Issue

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Closes: #

Type of change

Remove the irrelevant ones:

• New feature (non-breaking change which adds functionality)

Test methodology

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• Windows
• macOS
• Linux

Checklist

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• Change has been tested to work
• Areas your change affects have been linted using rustfmt
• Code has been self-reviewed
• Code has been tested and no new breakage is introduced unless intended
• Passes CI tests
• Documentation has been added/updated if needed (README, help menu, etc.)
• No merge conflicts arise from the change

Other information

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