Add support for escape sequence in string literals

[pPanda-beta]

Description

Add support for escape sequence

hi bhai
  bol bhai "mujhe chor do \"mere\" quotes pe";
bye bhai

and unicode character support

hi bhai
  bol bhai "Made with \u{1F48C} by bhailang community";
bye bhai

Domain

Bhai Lang

Type of Contribution

Enhancement

Code of Conduct

• [X] I follow Contributing Guidelines & Code of conduct of bhai-lang.

[nikhiljainlive]

The output for the first code can be achieved by the following:

hi bhai 
  bol bhai 'mujhe chor do "mere" quotes pe'; 
bye bhai