Move to Wasmer's interface

[edvakf]

I didn't think a lot about what interface Wagyu should implement. Now that we have Wasmer, we can use their interface. https://github.com/wasmerio/ruby-ext-wasm

API documentation https://github.com/wasmerio/ruby-ext-wasm#api-documentation

• [ ] Instance
  • [ ] new(bytes) => Instance
  • [ ] new(bytes, import_object) => [Unsupported]
  • [ ] #exports => ExportedFunctions
  • [ ] #memory => Memory
• [ ] ExportedFunctions
  • [ ] #respond_to_missing?
  • [ ] #method_missing => [call the function]
• [ ] Memory
  • [ ] #uint8_view => Uint8Array << MemoryView
  • [ ] #int8_view => Int8Array << MemoryView
  • [ ] #uint16_view => Uint16Array << MemoryView
  • [ ] #int16_view => Int16Array << MemoryView
  • [ ] #uint32_view => Uint32Array << MemoryView
  • [ ] #int32_view => Int32Array << MemoryView
  • [ ] #grow => Unsupported
• [ ] MemoryView << Enumerable
  • [ ] #bytes_per_element
  • [ ] #length
  • [ ] #[]=
  • [ ] #[]
  • [ ] #each
• [ ] Module
  • [ ] #validate => true/false
• [ ] ImportObject [Unsupported]
• [ ] Table Unsupported

[Hywan]

If some API are missing (like Memory.grow, or Table), please open issues, I will implement them.