Add all supported number bases and single/double quotes strings

[enricobolzonello]

• Add binary (0b), octal (0o), and hexadecimal (0x) number literal support
• Add single-quote string literal support
• Add test coverage for all number base formats
• Improve variable naming throughout

[ZocoLini]

There is something that also needs to be updated:

There is a couple of highlight queries in queries/highlight.csm:

[ "func"
  "return"
  "struct"
  "operator"
  "reverse"
  "type"] @keyword

(identifier) @variable
(string) @string
(number) @number
(comment) @comment

Because you renamed string and number this should no longer work. I would group all string literals under string and all the number literals under number