Refactoring HOS folder structure (#771)

* Refactoring HOS folder structure

Refactoring HOS folder structure:

- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close #766 and #753).

* Remove Types namespaces

Ryujinx.HLE/HOS/Services/Usb/IClientRootSession.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:hs")]
+    [Service("usb:hs:a")] // 7.0.0+
+    class IClientRootSession : IpcService
+    {
+        public IClientRootSession(ServiceCtx context) { }
+    }
+}

Ryujinx.HLE/HOS/Services/Usb/IDsService.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:ds")]
+    class IDsService : IpcService
+    {
+        public IDsService(ServiceCtx context) { }
+    }
+}

Ryujinx.HLE/HOS/Services/Usb/IPdCradleManager.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:pd:c")]
+    class IPdCradleManager : IpcService
+    {
+        public IPdCradleManager(ServiceCtx context) { }
+    }
+}

Ryujinx.HLE/HOS/Services/Usb/IPdManager.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:pd")]
+    class IPdManager : IpcService
+    {
+        public IPdManager(ServiceCtx context) { }
+    }
+}

Ryujinx.HLE/HOS/Services/Usb/IPmService.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:pm")]
+    class IPmService : IpcService
+    {
+        public IPmService(ServiceCtx context) { }
+    }
+}

Ryujinx.HLE/HOS/Services/Usb/IUnknown1.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:qdb")] // 7.0.0+
+    class IUnknown1 : IpcService
+    {
+        public IUnknown1(ServiceCtx context) { }
+    }
+}

Ryujinx.HLE/HOS/Services/Usb/IUnknown2.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Usb
+{
+    [Service("usb:obsv")] // 8.0.0+
+    class IUnknown2 : IpcService
+    {
+        public IUnknown2(ServiceCtx context) { }
+    }
+}