Merge 'upstream': various changes 2025-05-10

- fix: rename vim.highlight.on_yank to vim.hl.on_yank
- README: mention fd-find in requirements
- don't lazy-load neo-tree so netrw hijacking on startup works
- Replace vim.opt with vim.o
- feat: switch vim-sleuth for guess-indent.nvim
- Change to Mason's new address

lua/lazy-plugins.lua

@@ -11,7 +11,7 @@
 -- NOTE: Here is where you install your plugins.
 require('lazy').setup({
   -- NOTE: Plugins can be added with a link (or for a github repo: 'owner/repo' link).
-  'tpope/vim-sleuth', -- Detect tabstop and shiftwidth automatically
+  'NMAC427/guess-indent.nvim', -- Detect tabstop and shiftwidth automatically
 
   -- NOTE: Plugins can also be added by using a table,
   -- with the first argument being the link and the following