FEAT: adding sticky notes as a keybind

[DMelisena]

Pull Request

Description

A simple sticky notes feature. implementation of #1635 feature request. this will :

1. install https://github.com/vixalien/sticky from aur as a custom install and keybind it to Super+grave
2. keybind it as a script that check using pgrep, it will spawn if its not opened and close if its already opened
3. customize the apps as float on windows rule

ps: forgive me for not using the template on commit guidelines. I tried to comply with the contribution guideline but seems to miss it out.
this use the same key as quickphrase feature, i think from fcitx5 and will replace it. I never use the quickphrase feature myself though. I asked around and it seems that no one use it anyway.

Type of change

Please put an x in the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• [X ] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (non-breaking change; modified files are limited to the documentations)
• Technical debt (a code change that does not fix a bug or add a feature but makes something clearer for devs)
• Other (provide details below)

Checklist

Please put an x in the boxes that apply:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My commit message follows the commit guidelines.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added a changelog entry.
• I have added necessary comments/documentation to my code.
• I have added tests to cover my changes.
• I have tested my code locally and it works as expected.
• All new and existing tests passed.

Screenshots

Additional context

I missed out the commit message guideline, sorry. I also dont know where window rule should be implemented except on opacity. I Will suggest a documentation update if this seems to be applicable. This is my first try on contributing to an opensource so i wish for guidance.

[Enigma1309]

can we add support for flatpak app too?

[kRHYME7]

Should be in ./custom_apps.lst for optional packages

[mahaveergurjar]

Please add this package in ./custom_apps.lst don't add in ./custom_hypr.lst