improvement(game): rework internal sorting of skill

It'll make us able to sort them by acquisition level

sonic-radiance.love/game/characters.lua

@@ -139,11 +139,23 @@ function CharacterManager:getSkillList(id)
   for i, v in ipairs(character.skills) do
     local tech_name, tech_level, isLearned = v[1], v[2], false
     if tech_level <= character.stats.level then
+      local canLearn = true
+      for i, learnedSkill in ipairs(learnedlist) do
 
-      if learnedlist[tech_name] == nil then
-        learnedlist[tech_name] = 1
-      else
-        learnedlist[tech_name] = learnedlist[tech_name] + 1
+        -- We check if the skill have already been learned, to level-up it
+        if learnedSkill.name == tech_name then
+          canLearn = false
+          learnedSkill.level = learnedSkill.level + 1
+        end
+      end
+
+      if (canLearn) then
+        local skilldata = {}
+        skilldata.name      = tech_name
+        skilldata.level     = 1
+        skilldata.learnedAt = tech_level
+
+        table.insert(learnedlist, skilldata)
       end
 
     end

sonic-radiance.love/scenes/battlesystem/menu.lua

@@ -49,8 +49,8 @@ end
 function MenuConstructor:buildSkillMenu(character)
   CharacterMenu(self.controller, "SkillMenu", MENUPOS_X1 - 16, MENUPOS_Y)
   local list = game.characters:getSkillList(character.charid)
-  for k,v in pairs(list) do
-    SkillWidget(self.controller, "SkillMenu", k, "", character)
+  for k, skill in pairs(list) do
+    SkillWidget(self.controller, "SkillMenu", skill.name, "", character)
   end
   SubMenuWidget(self.controller,  "SkillMenu", "back", "BaseMenu", character)