Added padding function

[iamnoooob]

Adding a padding function, in some cases helper functions such as repeat(...) will work. However, an example use-case would be the dynamic value of {{interactsh-url}} which will change in length. In many cases, the length of the exploit payload matters (deserialization/binary data), and this comes in handy so you don't have to also modify the length field in your payload and instead directly use {{interactsh-url}} with some padding.

Example Usage:
pads('Test String','A',50) // will pad "Test String" up to 50 characters with "A" as padding byte.
Outputs:
"Test StringAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"

pads('{{interactsh-url}}/?','{{randstr}}',80) // will pad upto 80 chars of random string to adjust with the dynamic interactsh-url value everytime

Outputs:
1st Run: cjb3torug2jsnkiu13n0yqj3d3rnztn4f.oast.pro/?ikb1ZPxMoV2TqEqe04vtV1QeT68ikb1ZPxMo
2nd Run: cjb405jug2jsq2qdik70q1huj8mmkgwon.oast.online/?g66BX4W2TqFTNiiUkWGoLeS9obVg66BX4

Overall length always remains the same as specified in the last argument.

[tarunKoyalwar]

lgtm !