mecha release 0.10.0 which compiles and works for zig 0.14.0

Features

• Add mecha.unionInit

Changes

• The result of parsers have changed
  • Whether a parser succeeded in parsing the string is now returned in Result instead of as error.ParserFailed
    • To get out the result, you now have to unwrap the value union, which is either ok: T or err
  • Result now also contains an index instead of rest which contains the amount of progress made into the string
    • For success, this is the end of how much was parsed
    • For error, this is where parsing failed
• Allow mecha.toStruct to wrap a single value T in a struct with one field of type T (struct { field: T })