Different types of string literals

[kiedtl]

• Non-NUL terminated strings.
• Pascal strings.
• UTF-16 strings (limited or no usefulness?)

Possible syntaxes:

• (raw "lit") for non-nul-terminated, (pascal "lit") for pascal strings.
• #r "lit", #p "lit".

I'd prefer the metadata one, because that's really what metadata is for, but it'll require the parser code to undergo some refactoring to be able to handle metadata preceding a value.

Usecase: Strings in mixed static data. See projects/astar.finw -- the MAP static is defined as [[U8 51] 30] due to the null terminators, when it's really only a [[U8 50] 30].

[kiedtl]

projects/astar.finw is broken because of this

[kiedtl]

And projects/base64.finw. Alas.

[kiedtl]

Note to self: yet another reason for Pascal strings: strequ would be faster, since if the lengths differ it'd be caught immediately.