tokenize
Tokenizes the line.
For example: .friend add "Senk Ju" -> [`.friend`, `add`, `Senk Ju`]
Return
A pair of the tokenized command and the starting indices of the tokens
Tokenizes the line.
For example: .friend add "Senk Ju" -> [`.friend`, `add`, `Senk Ju`]
A pair of the tokenized command and the starting indices of the tokens