* 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.
* Use precompiled headers for libopenrct2 with MSVC
* Exclude PCH from duktape
duktape needs all the warnings turned off and forcing PCH also enables
warnings. As there is nothing duktape would consume from our header,
remove forcing inclusion of that header into duktape.
* Provide msbuild parameter for using PCH only in CI
Since many of the changes were made before the clang-format changes went live, the new source files used a different format still. This PR applies the new style to all the new source files.
Clang-format sees the text behind `#pragma region` as code and formats it. Instead of stating the copyright and date there, it's now in the comment block right below it. The text "Copyright" is left in the `#pragma region` line, as clang-format sees it as a single identifier.
I took the opportunity to normalize the dates, and add the copyright notice to the source files where it was missing them (except for third-party and the generated resources.h file).
