Collection of utils code

• ResourceEmbedder : Convert folder with binary data to cpp data
• U8ToX : Convert cpp unicode string format to UTF-8 format ("\uf1fb" => "\xEF\x87\xBB")

• BooleanExpression : Simple Lexer does to make a search engine
• JsonStthm : Simple Json parser/serializer
• StringBuilder : Create large string easily and optimally