feat: implement tokenizer

characterSet.go

characterSet_test.go

constants.go

error.go

parser_test.go

stateBeforeDictionaryValue.go

stateBeforeKey.go

stateByteOffsetOflastCrossreferenceSection.go

stateByteOffsetOflastCrossreferenceSection_test.go

stateComment.go

stateDictionary.go

stateDictionaryKey.go

stateEndDictionaryObject.go

stateEndOfFile.go

stateEndOfFile_test.go

stateEndOfIndirectObject.go

stateEndOfIndirectObject_test.go

stateEndOfLine_test.go

stateEndStreamObject.go

stateEndStreamObject_test.go