Add CI workflow to check line endings of all source files (#2082)

In addition, all found errors (formatting & line ending) have been fixed in this PR.

src/common/ChannelChatters.hpp

@@ -1,37 +1,37 @@
-#pragma once
-
-#include "common/Channel.hpp"
-#include "common/UniqueAccess.hpp"
-#include "common/UsernameSet.hpp"
-
-namespace chatterino {
-
-class ChannelChatters
-{
-public:
-    ChannelChatters(Channel &channel);
-    virtual ~ChannelChatters() = default;  // add vtable
-
-    AccessGuard<const UsernameSet> accessChatters() const;
-
-    void addRecentChatter(const QString &user);
-    void addJoinedUser(const QString &user);
-    void addPartedUser(const QString &user);
-    void setChatters(UsernameSet &&set);
-
-private:
-    Channel &channel_;
-
-    // maps 2 char prefix to set of names
-    UniqueAccess<UsernameSet> chatters_;
-
-    // combines multiple joins/parts into one message
-    UniqueAccess<QStringList> joinedUsers_;
-    bool joinedUsersMergeQueued_ = false;
-    UniqueAccess<QStringList> partedUsers_;
-    bool partedUsersMergeQueued_ = false;
-
-    QObject lifetimeGuard_;
-};
-
-}  // namespace chatterino
+#pragma once
+
+#include "common/Channel.hpp"
+#include "common/UniqueAccess.hpp"
+#include "common/UsernameSet.hpp"
+
+namespace chatterino {
+
+class ChannelChatters
+{
+public:
+    ChannelChatters(Channel &channel);
+    virtual ~ChannelChatters() = default;  // add vtable
+
+    AccessGuard<const UsernameSet> accessChatters() const;
+
+    void addRecentChatter(const QString &user);
+    void addJoinedUser(const QString &user);
+    void addPartedUser(const QString &user);
+    void setChatters(UsernameSet &&set);
+
+private:
+    Channel &channel_;
+
+    // maps 2 char prefix to set of names
+    UniqueAccess<UsernameSet> chatters_;
+
+    // combines multiple joins/parts into one message
+    UniqueAccess<QStringList> joinedUsers_;
+    bool joinedUsersMergeQueued_ = false;
+    UniqueAccess<QStringList> partedUsers_;
+    bool partedUsersMergeQueued_ = false;
+
+    QObject lifetimeGuard_;
+};
+
+}  // namespace chatterino