remove unused nix code

flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly-overlay':
    'github:nix-community/neovim-nightly-overlay/b7b3632fab34541543373254c265da03c1d0f240?narHash=sha256-SDLZMha2miaChOBGBkQJlTtk2kvcB7WIVVZ2l0/9byc%3D' (2025-10-01)
  → 'github:nix-community/neovim-nightly-overlay/7ff73a295b0065bde2f8b43b31558136ca77bd98?narHash=sha256-39JFRb006AOsIcOq%2B03H3y6YcGyaphk1CW5DRi14cOE%3D' (2025-10-13)
• Updated input 'neovim-nightly-overlay/flake-parts':
    'github:hercules-ci/flake-parts/4524271976b625a4a605beefd893f270620fd751?narHash=sha256-%2BuWLQZccFHwqpGqr2Yt5VsW/PbeJVTn9Dk6SHWhNRPw%3D' (2025-09-01)
  → 'github:hercules-ci/flake-parts/758cf7296bee11f1706a574c77d072b8a7baa881?narHash=sha256-wfG0S7pltlYyZTM%2BqqlhJ7GMw2fTF4mLKCIVhLii/4M%3D' (2025-10-01)
• Updated input 'neovim-nightly-overlay/git-hooks':
    'github:cachix/git-hooks.nix/54df955a695a84cd47d4a43e08e1feaf90b1fd9b?narHash=sha256-ytw7ROXaWZ7OfwHrQ9xvjpUWeGVm86pwnEd1QhzawIo%3D' (2025-09-17)
  → 'github:cachix/git-hooks.nix/cfc9f7bb163ad8542029d303e599c0f7eee09835?narHash=sha256-PTod9NG%2Bi3XbbnBKMl/e5uHDBYpwIWivQ3gOWSEuIEM%3D' (2025-10-03)
• Updated input 'neovim-nightly-overlay/neovim-src':
    'github:neovim/neovim/198c9e9bca7549cf7110be8c6f1df1c38d4e747f?narHash=sha256-oc1pPeoe8458X0r/Wum8CucVcJLlIp4mg%2B1HiOSVRgA%3D' (2025-09-30)
  → 'github:neovim/neovim/72b0bfa1fb7e897e5126aabae718a5480f466b9e?narHash=sha256-RnB%2BoJcP37YT9pjr1osUQtJc%2B1qcVyaaeSbiSyXwm1Y%3D' (2025-10-12)
• Updated input 'neovim-nightly-overlay/nixpkgs':
    'github:NixOS/nixpkgs/647e5c14cbd5067f44ac86b74f014962df460840?narHash=sha256-JVZl8NaVRYb0%2B381nl7LvPE%2BA774/dRpif01FKLrYFQ%3D' (2025-09-28)
  → 'github:NixOS/nixpkgs/362791944032cb532aabbeed7887a441496d5e6e?narHash=sha256-gKl2Gtro/LNf8P%2B4L3S2RsZ0G390ccd5MyXYrTdMCFE%3D' (2025-10-11)
• Updated input 'neovim-nightly-overlay/treefmt-nix':
    'github:numtide/treefmt-nix/5eda4ee8121f97b218f7cc73f5172098d458f1d1?narHash=sha256-ySNJ008muQAds2JemiyrWYbwbG%2BV7S5wg3ZVKGHSFu8%3D' (2025-09-24)
  → 'github:numtide/treefmt-nix/761ae7aff00907b607125b2f57338b74177697ed?narHash=sha256-gq9rdocpmRZCwLS5vsHozwB6b5nrOBDNc2kkEaTXHfg%3D' (2025-10-10)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d48b56f4899ee1d5377291576284969c9e37acc2?narHash=sha256-7G5fSMPNVwWNlFpZLwvKB8PUOaqPzFQbrtZ7RAzg2nw%3D' (2025-10-01)
  → 'github:NixOS/nixpkgs/09c05674757a82f32b67f70f702e56c4901a3cdd?narHash=sha256-IzUhHp/jU06jBW6S%2Bd12AO3sgq5yehYVTCBH7J6re5c%3D' (2025-10-13)

flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly-overlay/nixpkgs':
    'github:NixOS/nixpkgs/362791944032cb532aabbeed7887a441496d5e6e?narHash=sha256-gKl2Gtro/LNf8P%2B4L3S2RsZ0G390ccd5MyXYrTdMCFE%3D' (2025-10-11)
  → follows 'nixpkgs'

nvim/after/plugin/mini.lua

@@ -0,0 +1,78 @@
+local map = vim.keymap.set
+
+vim.schedule(function()
+  require('mini.align').setup()
+  require('mini.surround').setup()
+  require('mini.splitjoin').setup { detect = { separator = '[,;\n]' } }
+
+  local ai = require('mini.ai')
+  ai.setup {
+    n_lines = 300,
+    custom_textobjects = {
+      i = require('mini.extra').gen_ai_spec.indent(),
+      b = require('mini.extra').gen_ai_spec.buffer(),
+      a = ai.gen_spec.treesitter { a = '@parameter.outer', i = '@parameter.inner' },
+      f = ai.gen_spec.treesitter { a = '@function.outer', i = '@function.inner' },
+    },
+  }
+
+  require('mini.git').setup()
+  map('n', '<leader>gb', '<Cmd>Git blame -- %<CR>')
+  map('n', '<leader>go', function()
+    return MiniGit.show_at_cursor()
+  end)
+
+  local jump = require('mini.jump2d')
+  jump.setup {
+    mappings = {
+      start_jumping = '<leader>s',
+    },
+    view = { n_steps_ahead = 1, dim = true },
+    spotter = jump.gen_spotter.vimpattern(),
+  }
+
+  local diff = require('mini.diff')
+  diff.setup {
+    source = {
+      require('iofq.minidiff_jj').gen_source(),
+      diff.gen_source.git(),
+    },
+  }
+  map('n', '<leader>gp', MiniDiff.toggle_overlay)
+
+  require('mini.files').setup {
+    mappings = { go_in_plus = '<CR>' },
+    windows = {
+      preview = true,
+      width_preview = 50,
+    },
+  }
+  map('n', '<leader>nc', function()
+    MiniFiles.open(vim.api.nvim_buf_get_name(0), false) -- open current buffer's dir
+  end)
+  vim.api.nvim_create_autocmd('User', {
+    pattern = 'MiniFilesBufferCreate',
+    callback = function(args)
+      map('n', '<leader>nc', function()
+        MiniFiles.synchronize()
+        MiniFiles.close()
+      end, { buffer = args.data.buf_id })
+      map('n', '`', function()
+        local _, cur_entry_path = pcall(MiniFiles.get_fs_entry().path)
+        local cur_directory = vim.fs.dirname(cur_entry_path)
+        if cur_directory ~= '' then
+          vim.fn.chdir(cur_directory)
+        end
+      end, { buffer = args.data.buf_id })
+    end,
+  })
+
+  -- pass file rename events to LSP
+  vim.api.nvim_create_autocmd('User', {
+    group = vim.api.nvim_create_augroup('snacks_rename', { clear = true }),
+    pattern = 'MiniFilesActionRename',
+    callback = function(event)
+      Snacks.rename.on_rename_file(event.data.from, event.data.to)
+    end,
+  })
+end)