feat(nvim): reworked lsp, theme, cleanup

Signed-off-by: Ismo Vuorinen <ismo@ivuorinen.net>

config/nvim/lua/plugins/conform.lua

@@ -0,0 +1,66 @@
+return {
+  {
+    'stevearc/conform.nvim',
+    event = 'BufWritePre',
+    config = function()
+      local conform = require 'conform'
+
+      conform.setup {
+        formatters_by_ft = {
+          lua = { 'stylua' },
+        },
+        format_on_save = function(bufnr)
+          -- Disable autoformat for files in a certain paths
+          local bufname = vim.api.nvim_buf_get_name(bufnr)
+          if bufname:match '/dist|node_modules|vendor/' then return end
+
+          local disable_lsp = {
+            c = true,
+            cpp = true,
+          }
+          return {
+            lsp_fallback = not disable_lsp[vim.bo[bufnr].filetype],
+            timeout_ms = 500,
+          }
+        end,
+        notify_on_error = true,
+      }
+
+      vim.o.formatexpr = "v:lua.require'conform'.formatexpr()"
+
+      -- Autoformat toggle keybinding
+      local autoformat = true
+      vim.g.autoformat_enabled = autoformat
+
+      vim.api.nvim_create_user_command('ToggleFormat', function()
+        autoformat = not autoformat
+        vim.g.autoformat_enabled = autoformat
+        vim.notify('Autoformat on save: ' .. (autoformat and 'enabled' or 'disabled'))
+      end, {})
+
+      vim.keymap.set(
+        'n',
+        '<leader>tf',
+        ':ToggleFormat<CR>',
+        { desc = 'Toggle autoformat on save' }
+      )
+
+      vim.api.nvim_create_autocmd('BufWritePre', {
+        callback = function(args)
+          if autoformat then
+            conform.format {
+              bufnr = args.buf,
+              async = true,
+              lsp_format = 'fallback',
+            }
+          end
+        end,
+      })
+
+      -- Global statusline helper function
+      function _G.autoformat_status()
+        return vim.g.autoformat_enabled and '[ fmt:on]' or '[ fmt:off]'
+      end
+    end,
+  },
+}