Adopt existing namespaces into OpenRCT2 namespace (#22368)

* Put all of TitleSequenceManager into the same namespace

* Move RideConstructionState into the OpenRCT2 namespace

* Adopt existing namespaces into OpenRCT2 namespace

This adds `using namespace OpenRCT2` to compilation units where appropriate,
as a means to get the codebase to compile until these units have been placed
in a namespace of their own.

src/openrct2/core/Crypt.OpenSSL.cpp

@@ -20,7 +20,7 @@
 #    include <string>
 #    include <vector>
 
-using namespace Crypt;
+using namespace OpenRCT2::Crypt;
 
 static void OpenSSLThrowOnBadStatus(std::string_view name, int status)
 {
@@ -326,7 +326,7 @@ public:
     }
 };
 
-namespace Crypt
+namespace OpenRCT2::Crypt
 {
     std::unique_ptr<Sha1Algorithm> CreateSHA1()
     {
@@ -351,7 +351,7 @@ namespace Crypt
         OpenSSLInitialise();
         return std::make_unique<OpenSSLRsaKey>();
     }
-} // namespace Crypt
+} // namespace OpenRCT2::Crypt
 
 #    pragma GCC diagnostic pop