fix(Core/Player): Use SkillLineAbility.dbc to determine player initia… (#6015)

* fix(Core/Player): Use SkillLineAbility.dbc to determine player initial spells - skill assignment done in a new table `playercreateinfo_skills`

* Cherry-pick 2a3546ca36

* Cherry-Pick d28b66bca8

* Cherry-Pick 193408f335

- Closes https://github.com/azerothcore/azerothcore-wotlk/issues/1659
- Closes https://github.com/azerothcore/azerothcore-wotlk/issues/6036
- Closes https://github.com/chromiecraft/chromiecraft/issues/693

Co-Authored-By: Shauren shauren.trinity@gmail.com
Co-Authored-By: Rothend 67004168+Rothend@users.noreply.github.com
Co-Authored-By: claudiodfc claudio.daniel.f.c@gmail.com

src/server/shared/DataStores/DBCEnums.h

@@ -310,8 +310,8 @@ enum MapFlags
 
 enum AbilytyLearnType
 {
-    ABILITY_LEARNED_ON_GET_PROFESSION_SKILL     = 1,
-    ABILITY_LEARNED_ON_GET_RACE_OR_CLASS_SKILL  = 2
+    SKILL_LINE_ABILITY_LEARNED_ON_SKILL_VALUE   = 1, // Spell state will update depending on skill value
+    SKILL_LINE_ABILITY_LEARNED_ON_SKILL_LEARN   = 2  // Spell will be learned/removed together with entire skill
 };
 
 enum ItemEnchantmentType
@@ -333,6 +333,16 @@ enum ItemLimitCategoryMode
     ITEM_LIMIT_CATEGORY_MODE_EQUIP = 1,                      // limit applied to amount equipped items (including used gems)
 };
 
+enum SkillRaceClassInfoFlags
+{
+    SKILL_FLAG_NO_SKILLUP_MESSAGE       = 0x2,
+    SKILL_FLAG_ALWAYS_MAX_VALUE         = 0x10,
+    SKILL_FLAG_UNLEARNABLE              = 0x20,     // Skill can be unlearned
+    SKILL_FLAG_INCLUDE_IN_SORT          = 0x80,     // Spells belonging to a skill with this flag will additionally compare skill ids when sorting spellbook in client
+    SKILL_FLAG_NOT_TRAINABLE            = 0x100,
+    SKILL_FLAG_MONO_VALUE               = 0x400     // Skill always has value 1 - clientside display flag, real value can be different
+};
+
 enum SpellCategoryFlags
 {
     SPELL_CATEGORY_FLAG_COOLDOWN_SCALES_WITH_WEAPON_SPEED   = 0x01, // unused