config: Config error limit/hyprctl (#5165)

* Add error_limit to limit the number of config error messages shown in notification

* Add configerrors hyprctl command

* Formatting

* Formatting for not my code

* Use CVarList, add escapeJSONStrings

* Add indication there are more undisplayed errors

* Restore suppress_errors; move getErrors() to ConfigManager

* Formatting, wtf

* Format

src/config/ConfigManager.hpp

@@ -142,6 +142,7 @@ class CConfigManager {
     void                      addExecRule(const SExecRequestedRule&);
 
     void                      handlePluginLoads();
+    std::string               getErrors();
 
     // keywords
     std::optional<std::string> handleRawExec(const std::string&, const std::string&);
@@ -193,6 +194,7 @@ class CConfigManager {
     std::deque<std::string>                                   firstExecRequests;
 
     std::vector<std::pair<std::string, std::string>>          m_vFailedPluginConfigValues; // for plugin values of unloaded plugins
+    std::string                                               m_szConfigErrors = "";
 
     // internal methods
     void                       setAnimForChildren(SAnimationPropertyConfig* const);