feat(tabline): cleanup looks

lua/crentist/lazy/tabline.lua

@@ -1,3 +1,11 @@
+local theme = {
+  fill = 'TabLineFill',
+  head = 'TabLine',
+  current_tab = 'TabLineSel',
+  tab = 'TabLine',
+  win = 'TabLine',
+  tail = 'TabLine',
+}
 -- I literally need this for Dadbod for a nicer name in tabs. I don't use tabs
 -- in any other way
 return {
@@ -5,7 +13,21 @@ return {
     ---@module 'tabby'
     ---@type TabbyConfig
     opts = {
-    -- configs...
+        line = function(line)
+            return {
+                line.tabs().foreach(function(tab)
+                    local hl = tab.is_current() and theme.current_tab or theme.tab
+                    return {
+                        line.sep('', hl, theme.head),
+                        tab.number(),
+                        tab.name(),
+                        hl = hl,
+                        margin = ' ',
+                    }
+                end),
+                hl = theme.fill,
+            }
+        end,
     },
 }