Move nvim config into nvim/ subdirectory

Prepare repo structure for storing multiple dotfile configs.

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

nvim/lua/config/autocmds.lua

@@ -0,0 +1,35 @@
+local augroup = vim.api.nvim_create_augroup
+local autocmd = vim.api.nvim_create_autocmd
+
+-- Highlight on yank
+autocmd("TextYankPost", {
+  group = augroup("highlight_yank", { clear = true }),
+  callback = function()
+    vim.highlight.on_yank({ timeout = 200 })
+  end,
+})
+
+-- Remove trailing whitespace on save
+autocmd("BufWritePre", {
+  group = augroup("trim_whitespace", { clear = true }),
+  pattern = "*",
+  command = "%s/\\s\\+$//e",
+})
+
+-- Restore cursor position
+autocmd("BufReadPost", {
+  group = augroup("restore_cursor", { clear = true }),
+  callback = function()
+    local mark = vim.api.nvim_buf_get_mark(0, '"')
+    local lcount = vim.api.nvim_buf_line_count(0)
+    if mark[1] > 0 and mark[1] <= lcount then
+      pcall(vim.api.nvim_win_set_cursor, 0, mark)
+    end
+  end,
+})
+
+-- Auto-resize splits on window resize
+autocmd("VimResized", {
+  group = augroup("auto_resize", { clear = true }),
+  command = "tabdo wincmd =",
+})