* Update LibHac to 0.18.0

* Change instance of AsBytes(CreateReadOnlySpan(...)) to AsReadOnlyByteSpan(...)

* Use method overloads that support trimming. Mark some types to be trimming friendly

* Use generic version of marshalling method

* Removed unused usings.

* Added back using, now that it's used.

* Removed extra whitespace.

* hle: Some cleanup

This PR cleaned up a bit the HLE folder and the VirtualFileSystem one, since we use LibHac, we can use some class of it directly instead of duplicate things. The "Content" of VFS folder is removed since it should be handled in the NCM service directly.
A larger cleanup should be done later since there is still be duplicated code here and there.

* Fix Headless.SDL2

* Addresses gdkchan feedback

* Update to LibHac v0.14.3

* Fix loading NCAs that don't have a data partition

* Remove a bit of unsafety around

* Regenerate StructArrayHelpers with a max element value of 256

* hle: remove unsafe marker from all struct that had it

* hle: make SoftwareKeyboardRenderer.TryCopyTo safe

* hle: remove unsafety in NpadDevice and remove AllowUnsafeBlocks from csproj

* Revert "Regenerate StructArrayHelpers with a max element value of 256"

This reverts commit f32a6e5be094f50571970eb1116b65c080781d05.

* Introduce ByteArray of various size and use that instead of ArrayXXX to avoid stackoverflow in .NET runtime type resolution

* Use ByteArray more

* Add some missing spaces on Pack = 1 for various structs

* Fix broken logic for TryCopyTo

* Address gdkchan's comment

* Address gdkchan's comment