HLE: Refactoring of ApplicationLoader (#4480)

* HLE: Refactoring of ApplicationLoader

* Fix SDL2 Headless

* Addresses gdkchan feedback

* Fixes LoadUnpackedNca RomFS loading

* remove useless casting

* Cleanup and fixe empty application name

* Remove ProcessInfo

* Fixes typo

* ActiveProcess to ActiveApplication

* Update check

* Clean using.

* Use the correct filepath when loading Homebrew.npdm

* Fix NRE in ProcessResult if MetaLoader is null

* Add more checks for valid processId & return success

* Add missing logging statement for npdm error

* Return result for LoadKip()

* Move error logging out of PFS load extension method

This avoids logging "Could not find Main NCA"
followed by "Loading main..." when trying to start hbl.

* Fix GUIs not checking load results

* Fix style and formatting issues

* Fix formatting and wording

* gtk: Refactor LoadApplication()

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Co-authored-by: TSR Berry <20988865+TSRBerry@users.noreply.github.com>

Ryujinx.HLE/HOS/Services/Account/Acc/IAccountServiceForApplication.cs

@@ -190,7 +190,7 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc
             // TODO: Account actually calls nn::arp::detail::IReader::GetApplicationControlProperty() with the current Pid and store the result (NACP file) internally.
             //       But since we use LibHac and we load one Application at a time, it's not necessary.
 
-            context.ResponseData.Write((byte)context.Device.Application.ControlData.Value.UserAccountSwitchLock);
+            context.ResponseData.Write((byte)context.Device.Processes.ActiveApplication.ApplicationControlProperties.UserAccountSwitchLock);
 
             Logger.Stub?.PrintStub(LogClass.ServiceAcc);