feat: support php 8.4 and other improvements

[calebdw]

Closes #246

Changes:

• [PHP8.4] add support for new without parentheses
• [PHP8.4] add support for property hooks
• create anonymous_class rule
• rename _variable_name => _simple_variable to match php parser
• rename _class_type_designator => _class_name_reference to match php parser
• remove unnecessary semicolon from class declaration
• simplify by_ref definition
• create new _identifier and _name rules
• create _dereferencable_scalar rule to match php parser
• [BC] cleanup namespace rules
  • removed namespace_name_as_prefix, uses prefix field
  • removed namespace_aliasing_clause, uses alias field
  • removed namespace_use_group_clause, now uses namespace_use_clause inside namespace_use_group
• [BC] rename anonymous_function_creation_expression => anonymous_function
• remove inline rules to decrease state count (2627 => 2507)
• [BC] remove property_initializer rule, now uses a default_value field

Due to the BCs I plan to bump version to 0.23.0 after merging

[amaanq]

nice, I'll take a look soon

[aryx]

BTW @amaanq did you see my email? I tried to contact you on gmail but no answer :(

[amaanq]

Bumping to 0.23.0 is fine, I only ask that you do that when I release 0.23.0 upstream (soon)

(amended with generate optimization on master)

[amaanq]

thanks a ton again @calebdw, and I'm really sorry for taking a while :grimacing:

[calebdw]

No worries! Thanks for looking at it!