[feat] Uniform struct declarations

[Zffu]

Changelog:

• Changed the structured type declaration syntax from new <type> { fields.. } to { fields...}
• Added enum value creation using the structured type declaration syntax
• Made the struct initialize type less at first, allowing to remove the mention at creation
• Changed array initialization syntax from {0.5} to [0.5]
• Renamed from StructVariableInitializerValue to StructInitializer for clarity
• Reworked array value initializer parsing
• Added unsafe memory copy instruction (unsmemcopy)
• Added a fall back to build_store when the value type is a child enum and the pointer is a parent enum to use unsmemcopy instead of failing
• Added HIR type resolving system