after/ftplugin instead of autocmd

Use after/ftplugin instead of autocmds to handle options depending on
filetype

lua/weeheavy/autocmd.lua

@@ -7,12 +7,13 @@ vim.api.nvim_create_autocmd("TextYankPost", {
 	end,
 })
 
--- Disable (relative) line numbers on Oil windows
-vim.api.nvim_create_autocmd("FileType", {
-	group = vim.api.nvim_create_augroup("weeheavy-no-line-numbers-in-oil", { clear = true }),
-	pattern = { "oil" },
-	callback = function()
-		vim.opt.relativenumber = false
-		vim.opt.number = false
-	end,
-})
+-- NOTE: the config below was put to after/ftplugin to make it simpler
+
+-- Disable colorcolumn on quickfix (qf) windows
+--vim.api.nvim_create_autocmd("FileType", {
+--	group = vim.api.nvim_create_augroup("weeheavy-no-colorcolumn-in-quickfix", { clear = true }),
+--	pattern = { "qf", "Trouble" },
+--	callback = function()
+--		vim.opt.colorcolumn = ""
+--	end,
+--})