neovim: overhaul plugin config and keybinds

Remove lsp-zero (replaced with native Neovim 0.11 LSP support),
vim-fugitive, and pyright. Add basedpyright, gitsigns, which-key,
trouble, todo-comments, indent-blankline, and telescope-fzf-native.
Clean up duplicate keybinds and organize under which-key groups.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

home/editor/neovim/default.nix

@@ -16,17 +16,21 @@
         cmp_luasnip
         copilot-cmp
         copilot-lua
-        lsp-zero-nvim
+        gitsigns-nvim
+        indent-blankline-nvim
         lualine-nvim
         luasnip
         nvim-cmp
         nvim-lspconfig
         plenary-nvim
         telescope-nvim
+        telescope-fzf-native-nvim
+        todo-comments-nvim
+        trouble-nvim
         undotree
         vim-floaterm
-        vim-fugitive
         vim-sleuth
+        which-key-nvim
         (nvim-treesitter.withPlugins (p: [
           p.tree-sitter-yaml
           p.tree-sitter-nix
@@ -57,7 +61,7 @@
 
     # LSPs
     gopls
-    pyright
+    basedpyright
     nodePackages.typescript-language-server
     nodePackages.typescript
     nil