separate debug component for each platform in different file (#6715)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/debug/debug_host.cpp

@@ -0,0 +1,18 @@
+#include "debug_component.h"
+#ifdef USE_HOST
+#include <climits>
+
+namespace esphome {
+namespace debug {
+
+std::string DebugComponent::get_reset_reason_() { return ""; }
+
+uint32_t DebugComponent::get_free_heap_() { return INT_MAX; }
+
+void DebugComponent::get_device_info_(std::string &device_info) {}
+
+void DebugComponent::update_platform_() {}
+
+}  // namespace debug
+}  // namespace esphome
+#endif