* add reversed words and update token processing to allow
fulltext search to match end of word (e.g. searching 'wind -storm'
will now find 'whisperwind' or 'windrunner' and ignore 'stormwind')
* fix search token duplication for spells
* move fulltext indizes for tables /w ~10k+ rows to separate tables
> sounds have ~12k but names are effectively incompatible with FTI
* normalize searchable strings to catch edgecases
> preparse spell descriptions + buffs
> move effect text cols of items to new table
* also fix extended search of creatures, spells & quests