fix: escape double quotes in share module serialize

- The serialize() function didn't escape " in string values, causing exports to be invalid Lua whenever a value contained double quotes (e.g. clickcast macros like CastSpellByName("Nature's Swiftness")). This made the Import button stay red with no error message.

modules/share.lua

@@ -15,7 +15,9 @@ pfUI:RegisterModule("share", "vanilla:tbc", function ()
           end
         elseif type(v) == "string" then
           match = true
-          str = str .. spacing .. "  [\""..k.."\"] = \"".. string.gsub(v, "\\", "\\\\") .."\",\n"
+          local escaped = string.gsub(v, "\\", "\\\\")
+          escaped = string.gsub(escaped, "\"", "\\\"")
+          str = str .. spacing .. "  [\""..k.."\"] = \"".. escaped .."\",\n"
         elseif type(v) == "number" then
           match = true
           str = str .. spacing .. "  [\""..k.."\"] = ".. string.gsub(v, "\\", "\\\\") ..",\n"
@@ -446,4 +448,4 @@ pfUI:RegisterModule("share", "vanilla:tbc", function ()
       f:Show()
     end
   end
-end)
+end)