Refactor how attributes and method signatures work

[ShawnClake]

Attributes (Have at least 1):

• static - Denotes being able to be called on an imported file rather than an instance
• async - Denotes running this method in a new thread

Examples

• static async myFunc() {}
• static myFunc() {}
• async myFunc() {}
• myFunc() {}
• static myFunc() {}
• async myFunc() {}

[ShawnClake]

this has been revised to support:

• script
• static
• async

Examples

• script myfunc() {}
• script static myfunc() {}
• script static async myfunc() {}
• static myfunc() {}
• static async myfunc() {}
• async myfunc() {}

[ShawnClake]

grammar added, not implemented