Remove todo-comments in favor of mini-hipatterns

lua/plugins/mini.lua

@@ -35,6 +35,17 @@ return { -- Collection of various small independent plugins/modules
     -- Trim all trailing empty lines with MiniTrailspace.trim_last_lines().
     require('mini.trailspace').setup()
 
+    require('mini.hipatterns').setup {
+      highlighters = {
+        fixme = { pattern = 'FIXME', group = 'MiniHipatternsFixme' },
+        hack = { pattern = 'HACK', group = 'MiniHipatternsHack' },
+        todo = { pattern = 'TODO', group = 'MiniHipatternsTodo' },
+        note = { pattern = 'NOTE', group = 'MiniHipatternsNote' },
+        see = { pattern = '[Ss][Ee][Ee]:', group = 'MiniHipatternsNote' },
+        warning = { pattern = 'WARNING', group = 'MiniHipatternsFixme' },
+      },
+    }
+
     -- Simple and easy statusline.
     --  You could remove this setup call if you don't like it,
     --  and try some other statusline plugin