Create the String Manipulation Extension

[nsensfel]

Wyrd has no features allowing string manipulation. Thus, any such functions would have to be fully implemented by the interpreter, which make their addition to the main language problematic.

List of Wyrd functions for this extension:

• Regex capture
• Uppercase
• Lowercase
• Substring
• Concatenate
• String length

List of Fate functions for this extension:

• All the Wyrd functions.
• Regex match test
• Float to string with a given precision.