Feat: add hover boxes and diagnostics from lsp

grammar/man.scm

@@ -0,0 +1,23 @@
+;; #82AAFF #000000 1 0 1 2
+(title) @markup.heading.1
+
+;; #ccefc9 #000000 0 0 0 0
+(section_title) @markup.heading.2
+
+;; #FF8F40 #000000 1 0 0 2
+(subsection_title) @markup.heading.3
+
+;; #AAD94C #000000 0 0 0 3
+(option) @variable.parameter
+
+;; #FFD700 #000000 1 0 0 3
+(reference) @markup.link.label
+
+;; #C792EA #000000 0 0 0 3
+(footer) @markup.heading
+
+(section_heading
+  (section_title) @_title
+;; #FFD700 #000000 1 0 0 1
+  (block) @injection.content
+  (#match? @_title "SYNOPSIS"))