feat: Flake | revamp entire flake (#1)

Reviewed-on: #1

dotfiles/nvim/lua/custom/init.lua

@@ -0,0 +1,6 @@
+vim.g.maplocalleader = ","
+vim.opt.colorcolumn = "80"
+vim.g.copilot_no_tab_map = true
+vim.api.nvim_set_keymap("i", "<C-o>", 'copilot#Accept("<CR>")', { silent = true, expr = true, noremap = true, script = true })
+vim.wo.relativenumber = true
+vim.g.scrolloff = 8