[cheats] add runtime cheats toggles with master code support (#4334)

add per-cheat runtime toggles (thread-safe).
add master code handling (master code cannot be disabled, as noted in Atmosphere's implementation).
add configurable global / per-game initial states for cheat entries.
remove fixed opcode limits and do some fixes to text parsing / file loading.
do not run debug log while cheat logging is not enabled, to reduce performance impacts.
update the `Using Cheats` document to reflect the changes.

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4334
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: John <john@eden-emu.dev>

src/core/memory/cheat_engine.h

@@ -9,6 +9,7 @@
 #include <atomic>
 #include <chrono>
 #include <memory>
+#include <mutex>
 #include <vector>
 #include "common/common_types.h"
 #include "core/memory/dmnt_cheat_types.h"
@@ -41,6 +42,7 @@ public:
     void ResumeProcess() override;
     void DebugLog(u8 id, u64 value) override;
     void CommandLog(std::string_view data) override;
+    [[nodiscard]] bool IsCommandLogEnabled() const override;
 
 private:
     bool IsAddressInRange(VAddr address) const;
@@ -81,6 +83,8 @@ public:
     void SetMainMemoryParameters(VAddr main_region_begin, u64 main_region_size);
 
     void Reload(std::vector<CheatEntry> reload_cheats);
+    [[nodiscard]] std::vector<RuntimeCheatInfo> GetCheats() const;
+    bool SetCheatEnabled(u32 cheat_id, bool enabled);
 
 private:
     void FrameCallback(std::chrono::nanoseconds ns_late);
@@ -89,6 +93,7 @@ private:
     CheatProcessMetadata metadata;
 
     std::vector<CheatEntry> cheats;
+    mutable std::mutex cheats_mutex;
     std::atomic_bool is_pending_reload{false};
 
     std::shared_ptr<Core::Timing::EventType> event;