feat: whitespace/indent markers

lua/core/options.lua

@@ -37,6 +37,8 @@ vim.opt.cursorline = false
 vim.opt.ruler = false
 vim.opt.winborder = 'rounded'
 vim.opt.guicursor = 'n-v-i-c:block'
+vim.opt.list = true
+vim.opt.listchars = { leadmultispace = '│ ', tab = '→ ', trail = '·' }
 
 vim.opt.laststatus = 3
 vim.opt.statusline = '── %f %h%w%m%r %= [%l,%c-%L] ──'