chore(nvim): move completion plugins to nix

[kaihowl]

topic: chorenvim-move-completion-plugins-to-nix
relative:chorenvim-move-available-color-schemes-to-nix
labels:draft

[kaihowl]

Reviews in this chain:
└#869 chore(nvim): move completion plugins to nix
　└#870 chore(nvim): remove unused fugitive handler / move rhubarb to nix
　　└#871 chore(nvim): move asyncrun/asynctasks to nix
　　　└#872 chore(nvim): move last two easily available plugins to nix

[kaihowl]

#	head	base	diff	date	summary
0	50235743	b817c54b	diff	Dec 15 11:02 AM	2 files changed, 7 insertions(+), 8 deletions(-)
1	2d6fa567	5fc76ff4	rebase	Dec 15 11:03 AM	0 files changed
2	d98f2be1	602328df	rebase	Dec 15 11:41 AM	0 files changed
3	8445d402	fd9de6cf	diff	Dec 15 11:52 AM	0 files changed

[github-actions]

⏱ Performance Results

[github-actions]

⏱ Performance Results