Customize achi's nvim config.

- disable mouse mode since it's hard to copy text.
- introduce .editorconfig for different file types.

Author: andychi117

.editorconfig

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# copy from https://github.com/torvalds/linux/blob/master/.editorconfig
+
+root = true
+
+[{*.{awk,c,dts,dtsi,dtso,h,mk,s,S},Kconfig,Makefile,Makefile.*}]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = tab
+indent_size = 8
+
+[*.{json,py,rs}]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+
+# this must be below the general *.py to overwrite it
+[tools/{perf,power,rcu,testing/kunit}/**.py,]
+indent_style = tab
+indent_size = 8
+
+[*.yaml]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2

init.lua

@@ -105,7 +105,7 @@ vim.o.number = true
 -- vim.o.relativenumber = true
 
 -- Enable mouse mode, can be useful for resizing splits for example!
-vim.o.mouse = 'a'
+vim.o.mouse = ''
 
 -- Don't show the mode, since it's already in the status line
 vim.o.showmode = false
@@ -185,10 +185,10 @@ vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagn
 vim.keymap.set('t', '<Esc><Esc>', '<C-\\><C-n>', { desc = 'Exit terminal mode' })
 
 -- TIP: Disable arrow keys in normal mode
--- vim.keymap.set('n', '<left>', '<cmd>echo "Use h to move!!"<CR>')
--- vim.keymap.set('n', '<right>', '<cmd>echo "Use l to move!!"<CR>')
--- vim.keymap.set('n', '<up>', '<cmd>echo "Use k to move!!"<CR>')
--- vim.keymap.set('n', '<down>', '<cmd>echo "Use j to move!!"<CR>')
+vim.keymap.set('n', '<left>', '<cmd>echo "Use h to move!!"<CR>')
+vim.keymap.set('n', '<right>', '<cmd>echo "Use l to move!!"<CR>')
+vim.keymap.set('n', '<up>', '<cmd>echo "Use k to move!!"<CR>')
+vim.keymap.set('n', '<down>', '<cmd>echo "Use j to move!!"<CR>')
 
 -- Keybinds to make split navigation easier.
 --  Use CTRL+<hjkl> to switch between windows