Restructure source and resource files (#46)

importantly, res is now res/res and css is now res/css

src/components/chatinputindicator.hpp

@@ -0,0 +1,28 @@
+#pragma once
+#include <gtkmm.h>
+#include <unordered_map>
+#include "discord/message.hpp"
+#include "discord/user.hpp"
+
+class ChatInputIndicator : public Gtk::Box {
+public:
+    ChatInputIndicator();
+    void SetActiveChannel(Snowflake id);
+    void SetCustomMarkup(const Glib::ustring &str);
+    void ClearCustom();
+
+private:
+    void AddUser(Snowflake channel_id, const UserData &user, int timeout);
+    void OnUserTypingStart(Snowflake user_id, Snowflake channel_id);
+    void OnMessageCreate(const Message &message);
+    void SetTypingString(const Glib::ustring &str);
+    void ComputeTypingString();
+
+    Gtk::Image m_img;
+    Gtk::Label m_label;
+
+    Glib::ustring m_custom_markup;
+
+    Snowflake m_active_channel;
+    std::unordered_map<Snowflake, std::unordered_map<Snowflake, sigc::connection>> m_typers; // channel id -> [user id -> connection]
+};