Boolean expressions and conditional expression designs

[ahmetozdemirrr]

In this step we expect if-else-elif properties to be added to the language.

• This step will be designed with the keywords and operators specified in the lexical properties.
• The function will be added in the parser to be written in Bison.

An example usage:

if(BOOL_EXP){
    # ...
}

elif(BOOL_EXP){
    # ...
}

else(BOOL_EXP){
    # ...
}