Implement simple ignored phrase system

src/controllers/ignores/ignorecontroller.cpp

@@ -0,0 +1,36 @@
+#include "controllers/ignores/ignorecontroller.hpp"
+
+#include "application.hpp"
+#include "controllers/ignores/ignoremodel.hpp"
+
+#include <cassert>
+
+namespace chatterino {
+namespace controllers {
+namespace ignores {
+
+void IgnoreController::initialize()
+{
+    assert(!this->initialized);
+    this->initialized = true;
+
+    for (const IgnorePhrase &phrase : this->ignoresSetting.getValue()) {
+        this->phrases.appendItem(phrase);
+    }
+
+    this->phrases.delayedItemsChanged.connect([this] {  //
+        this->ignoresSetting.setValue(this->phrases.getVector());
+    });
+}
+
+IgnoreModel *IgnoreController::createModel(QObject *parent)
+{
+    IgnoreModel *model = new IgnoreModel(parent);
+    model->init(&this->phrases);
+
+    return model;
+}
+
+}  // namespace ignores
+}  // namespace controllers
+}  // namespace chatterino