cleanup main.cpp, split platform code into a Platform object

lib/Figments/Input.h

@@ -163,7 +163,7 @@ class OnlineTaskMixin : public virtual Loopable {
         }
     }
 
-    virtual void handleEventOnline(const InputEvent &evt) = 0;
+    virtual void handleEventOnline(const InputEvent &evt) {}
 
     void loop() override {
         if (m_online) {
@@ -171,7 +171,7 @@ class OnlineTaskMixin : public virtual Loopable {
         }
     }
 
-    virtual void loopOnline() = 0;
+    virtual void loopOnline() {}
 
   private:
     bool m_online = false;

lib/Figments/Ringbuf.h

@@ -31,6 +31,16 @@ struct Ringbuf {
         }
         m_items[cur] = src;
     }
+
+    size_t write(T(&dest)[Size]) {
+        int i = 0;
+        size_t ret = 0;
+        while(take(dest[i])) {
+          i++;
+          ret += sizeof(T);
+        }
+        return ret;
+    }
 private:
     int m_head = 0;
     int m_tail = 0;