Support enums rfc

[TysonAndre]

https://wiki.php.net/rfc/enumerations

• Update php-ast requirement (1.0.11 partially supports it, 1.0.12 will support the latest php 8.1)
• Update tolerant-php-parser
• Warn about instantiating enums
• Warn about attempting to write to or unset or read missing properties
• Warn about invalid declarations
• Warn about mismatch of enum X: int { case INVALID = 'not an int'; }, etc (reading : int requires bumping minimum AST version (from 80 to 85+) and php-ast version
• Overload template syntax to support enums, or support class constant syntax
• Warn about enum with no case being suspicious when there are instance methods
• Warn about instance&static properties on enums being forbidden
• Class constants would be allowed to be enums
• Warn about case on non-enum
• Warn about declaring forbidden magic methods on enums (only __call, __callStatic, and __invoke magic methods are permitted)

   php > enum Foo { public function __set($name, $value) {}}
  
   Fatal error: Enum may not include __set in php shell code on line 1
  

• Warn about calling clone on enums
• Infer that $case->name exists on all enums, $case->value exists on backed enums with a int/string type (and doesn't exist on unit enums)
• Infer that typed enums implement BackedEnum and implement the cases()/from/tryFrom() methods - cases is a list of known size
• Infer that unit enums implement UnitEnum and implement cases() - cases is still a list
• Add more specific type signatures for UnitEnum/BackedEnum
• Infer that ArrayAccess and ... unpacking (Traversable) on enums is forbidden in constant expressions