refactor: golf core module

doc/tiny-lightbulb.txt

@@ -36,7 +36,6 @@ That's it. The plugin auto-loads with defaults. To customize, call setup: >lua
     require("tiny-lightbulb").setup({
       sign = "💡",
       hl = "DiagnosticWarn",
-      priority = 10,
     })
 <
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@@ -53,16 +52,14 @@ setup({opts})
         require("tiny-lightbulb").setup({
           sign = "💡",         -- sign column text
           hl = "DiagnosticWarn", -- highlight group for the sign
-          priority = 10,        -- extmark priority
         })
 <
     Parameters: ~
       {opts}  (table|nil) Configuration table
 
     Fields: ~
-      {sign}      (string) Text shown in the sign column. Default: "💡"
-      {hl}        (string) Highlight group for the sign. Default: "DiagnosticWarn"
-      {priority}  (number) Extmark priority. Default: 10
+      {sign}  (string) Text shown in the sign column. Default: "💡"
+      {hl}    (string) Highlight group for the sign. Default: "DiagnosticWarn"
 
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 vim:tw=78:ts=8:ft=help:norl: