feat: add support for neovim v0.9 about kitty-scrollback.nvim

[mikesmithgh]

Thanks for the PR @jackielii! kitty-scrollback.nvim now supports neovim v0.9.

Thanks all who added discussions/upvoted. If anyone has any problems, feel free to open an issue. 🐱

[Andrew15-5]

I don't think I mentioned this before, but I created smoka7/multicursors.nvim#67 because in Neovim v0.10 the plugin breaks https://github.com/okuuva/auto-save.nvim and itself. So I can't edit in multiple places + auto-save just doesn't work anymore (after I start using multicursor), and I have to manually save every time. So I do experience some negative consequences of an unstable Neovim version. This is an example why kitty-scrollback.nvim plugin should support at least the latest stable version (0.9.4).

[jackielii]

FWIW, vim.system source is just one file, can we vendor it and import it base on version?

[mikesmithgh]

See #53

[mikesmithgh]

See #55

[mikesmithgh]

FWIW, vim.system source is just one file, can we vendor it and import it base on version?

Good find. Off the top of my head, we could probably have a check if vim.system is defined. If not, then have a copy of https://github.com/neovim/neovim/blob/master/runtime/lua/vim/_system.lua in kitty-scrollback.nvim that we can use to define vim.system for versions < 0.10.