[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/common/logging.cpp

@@ -418,6 +418,10 @@ void SetGlobalFilter(const Filter& filter) {
         logging_instance->filter = filter;
 }
 
+bool IsMessageEnabled(Class log_class, Level log_level) {
+    return logging_instance && logging_instance->filter.CheckMessage(log_class, log_level);
+}
+
 void SetColorConsoleBackendEnabled(bool enabled) {
     if (logging_instance)
         logging_instance->color_console_backend.enabled = enabled;

src/common/logging.h

@@ -138,6 +138,7 @@ void Stop();
 
 /// The global filter will prevent any messages from even being processed if they are filtered.
 void SetGlobalFilter(const Filter& filter);
+[[nodiscard]] bool IsMessageEnabled(Class log_class, Level log_level);
 void SetColorConsoleBackendEnabled(bool enabled);
 
 } // namespace Common::Log

src/common/settings.h

@@ -247,6 +247,7 @@ struct Values {
 
     SwitchableSetting<bool> sync_core_speed{linkage, false, "sync_core_speed", Category::Core,
                                             Specialization::Default};
+    SwitchableSetting<bool> enable_cheats_by_default{linkage, true, "enable_cheats_by_default", Category::Core};
 
     // Cpu
     SwitchableSetting<CpuBackend, true> cpu_backend{linkage,