vim-patch:9.1.1214: matchfuzzy() can be improved for camel case matches

Problem:  When searching for "Cur", CamelCase matches like "lCursor" score
          higher than exact prefix matches like Cursor, which is
          counter-intuitive (Maxim Kim).
Solution: Add a 'camelcase' option to matchfuzzy() that lets users disable
          CamelCase bonuses when needed, making prefix matches rank higher.
          (glepnir)

fixes: vim/vim#16504
closes: vim/vim#16797

28e40a7b55

Co-authored-by: glepnir <glephunter@gmail.com>

runtime/lua/vim/_meta/vimfn.lua

@@ -5815,6 +5815,9 @@ function vim.fn.matchend(expr, pat, start, count) end
 ---     given sequence.
 ---     limit  Maximum number of matches in {list} to be
 ---     returned.  Zero means no limit.
+---     camelcase  Use enhanced camel case scoring making results
+---     better suited for completion related to
+---     programming languages. Default is v:true
 ---
 --- If {list} is a list of dictionaries, then the optional {dict}
 --- argument supports the following additional items: