Add support for inline scripts

* Script can be defined in the macro segment or loaded from a file
* Supports both LUA and Python
* Can be used for actions and conditions
* obs_script_create and obs_script_destroy are resolved at runtime
  (Let's hope the API remains stable)

plugins/scripting/utils/obs-script-helpers.hpp

@@ -0,0 +1,23 @@
+#pragma once
+#include <obs-data.h>
+
+#include <string>
+
+// Based on obs-scripting.h
+
+struct obs_script;
+typedef struct obs_script obs_script_t;
+
+enum obs_script_lang {
+	OBS_SCRIPT_LANG_UNKNOWN,
+	OBS_SCRIPT_LANG_LUA,
+	OBS_SCRIPT_LANG_PYTHON
+};
+
+namespace advss {
+
+obs_script_t *CreateOBSScript(const char *path, obs_data_t *settings);
+void DestroyOBSScript(obs_script_t *script);
+std::string GetLUACompatiblePath(const std::string &path);
+
+} // namespace advss