feat: Add support for if-else-if ladders in bhailang - #214

[vipul0092]

This PR closes issue #214 by adding support for if-else-if ladders

Example: hi bhai bhai ye hai x = 10; agar bhai (x < 5) { bol bhai "x < 5"; } nahi to bhai (x < 8) { bol bhai "x < 8"; } nahi to bhai (x < 12) { bol bhai "x < 12"; } nahi to bhai (x < 15) { bol bhai "x < 15"; } bye bhai;

Output: x < 12

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[tbhaxor]

@vipul0092 Shandar bhai 🎉. Iska syntax highlight bhi kar hi do fir

[vipul0092]

Requesting review for this change guys @aniketsingh0104 @ankitchouhan1020 @ristri

[vipul0092]

@aniketsingh0104 Handled the review comments, please take a look once again

[vipul0092]

@aniketsingh0104 Removed the unnecessary whitespace change in scope.ts, should be good to go now