Add the bitwise operators

[Wide-Cat]

Tried to follow Java syntax, but due to the ^ symbol already being used as the exponentiation operator I had to improvise for Xor. Happy to hear other suggestions but I thought this was one of the better compromises. Redefining ^ to be used for Xor and adding something else for exponentiation isn't really an option as it would break existing scripts.

Have to cast the arguments into longs since you can't perform bitwise operations on floating point types. Should we do this and silently floor the arguments, or should we restrict these operators to only be used on whole numbers and error otherwise?

Additions:
& - Bitwise And
| - Bitwise Or
|^ - Bitwise Xor
~ - Bitwise Not
<< - Left shift
>> - Signed right shift
>>> - Unsigned right shift

[chri-k]

note: the second-most-common symbol for xor across languages (after ^) is~ (since not is just xor with a constant, as negation is just subtraction form a constant)

[moxvallix]

Maybe ^^ works?

[GreemDev]

I just pulled this PR into my C# port of Starscript (linked above, I've been linking the PR I'm getting the base from), and I noticed this PR misses the SemanticTokenProvider changes for the new tokens. Without it, Meteor's StarscriptTextBox syntax highlighting won't support the new operators until added.