Migrate Pull requests from Sway

[OctopusET]

After swaywm/sway#7541, contributed scripts in contrib/ directory will be managed in this repository.

Here's the list of PR from https://github.com/swaywm/sway

PR from sway	PR in this repo	status	Original author
swaywm/sway#5919	#21	merged	@bugrasan
swaywm/sway#6286	#11	merged	@RagnarGrootKoerkamp
swaywm/sway#6951		no PR	@kraftwerk28
swaywm/sway#7104		no PR	@anpandey
swaywm/sway#7158	#10	merged	@paulodiovani
swaywm/sway#7238	#21	merged	@orthros
swaywm/sway#7538		no PR	@buyolitsez
swaywm/sway#7643	#1	merged	@ebbit1q
swaywm/sway#7656	#3	merged	@Omrigan

If you are interested in contributing your work to this repository, please submit a pull request.

I can just cherry-pick some commits, but I think it would be better to be done by original authors.
Issues also could be migrated to this repository.

[OctopusET]

Some of PRs are still missing. If someone find some PR for contrib/ directory in sway repository. Please share it.

[orthros]

I will migrate my PRs across soon, ~1 week.

[OctopusET]

@orthros Thank you so much!

[gibbz00]

swaywm/sway#7197

[paulodiovani]

New PR: Chore / Limit grimshot window grab #10

[RagnarGrootKoerkamp]

I made #11 to replace swaywm/sway#6286 .