More standard support for the `BusComponent` interface.

Allows blargg's test ROM to pass.

Made sure that OAM DMA takes 160 cycles to process.

This is a way of controlling the bytes that have already been written by the DMA controller.

Clarifies the boot state handling.

Improved some comments for DMA.

Added more pedantic validations preventing simple dummy data from being loaded.

Support for some basic Python testing.
Handling of loading error with proper error propagation.

Made the testing of the timer work.

Also made some initial timer validation.

Including version and complier info.

Makes it consistent with the WebAssembly naming conventions.

These functions act as wrappers modifying the error value of the original function into a string.

Converted the `state.rs` into an Error enum version of result.

Makes use of the `Error` enum to handle errors. This is a better way to handle errors in Rust. It is also more idiomatic.

Contains detailed information about the inner structure.

Made use of const values to store global data.
Polling is done on every tick, supposedly it's the best approach for libretro.

Added more error handling.