Add project files.

source/examples/HotReloadDemo/PluginV1/src/Plugin.cpp

@@ -0,0 +1,31 @@
+/* PluginV1 -- "before your edit". See PluginV2/src/Plugin.cpp for
+ * "after"; the two deliberately export the identical set of names
+ * (minus plugin_legacy_feature, removed in V2) so HotReloadContext can
+ * line them up. See ../Shared/PluginApi.h for what each export is
+ * there to demonstrate.
+ */
+#include "PluginApi.h"
+
+#include <cstdio>
+
+int plugin_tick(int input)
+{
+	int result = input * 2;
+	std::printf("    plugin_tick(%d) -> %d   [V1: input * 2]\n", input, result);
+	return result;
+}
+
+int plugin_legacy_feature(int input)
+{
+	std::printf("    plugin_legacy_feature(%d) -> %d   [V1, about to be removed in V2]\n", input, input);
+	return input;
+}
+
+#if defined(__GNUC__) || defined(__clang__)
+int plugin_tiny_function(int input)
+{
+	return input + 1;
+}
+#endif
+
+int plugin_build_marker = 1;