sc: bone eater preliminary support (#895)

## Link to GitHub Issue or related Pull Request, if one exists
Fixes #114

## Description of change
Initial support for Silent Scope: Bone Eater, enough to be playable;
doesn't include QoS work needed to make this a smoother experience.

* Game detection
* Fix DX11 overlay to work with non-Unity games
* Implements sub monitor i/o (only really needed to get past I/O check)
* Try to make the game reasonably playable with a mouse
* Ignore the game's attempt to move windows, position them in a
reasonable place
* Fix language hook

## Testing

src/spice2x/games/silentscope/projector.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <cstdint>
+#include <deque>
+#include <mutex>
+#include <vector>
+
+#include "hooks/devicehook.h"
+
+namespace games::silentscope {
+
+    // The cabinet talks to its projector over COM2. Without an answer the game stops at
+    // I/O error 5-1560-0004 (IOCOM2, "the projector is not connected correctly").
+    class ProjectorHandle : public CustomHandle {
+    public:
+        bool open(LPCWSTR lpFileName) override;
+        int read(LPVOID lpBuffer, DWORD nNumberOfBytesToRead) override;
+        int write(LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite) override;
+        size_t bytes_available() override;
+        bool close() override;
+
+    private:
+        std::mutex mutex;
+        std::vector<uint8_t> request;
+        std::deque<uint8_t> response;
+
+        void process_request(const uint8_t *packet);
+        void reply(uint8_t command, const std::vector<uint8_t> &data);
+    };
+}