scripting: rename backend names for concise naming

player/javascript.c

@@ -1256,7 +1256,7 @@ static void add_functions(js_State *J, struct script_ctx *ctx)
 
 // main export of this file, used by cplayer to load js scripts
 const struct mp_scripting mp_scripting_js = {
-    .name = "javascript",
+    .name = "js",
     .file_ext = "js",
     .load = s_load_javascript,
 };

player/lua.c

@@ -1335,7 +1335,7 @@ static void add_functions(struct script_ctx *ctx)
 }
 
 const struct mp_scripting mp_scripting_lua = {
-    .name = "lua script",
+    .name = "lua",
     .file_ext = "lua",
     .load = load_lua,
 };

player/scripting.c

@@ -396,11 +396,10 @@ error: ;
 }
 
 const struct mp_scripting mp_scripting_cplugin = {
+    .name = "cplugin",
     #if HAVE_WIN32
-    .name = "DLL plugin",
     .file_ext = "dll",
     #else
-    .name = "SO plugin",
     .file_ext = "so",
     #endif
     .load = load_cplugin,
@@ -458,7 +457,7 @@ static int load_run(struct mp_script_args *args)
 }
 
 const struct mp_scripting mp_scripting_run = {
-    .name = "spawned IPC process",
+    .name = "ipc",
     .file_ext = "run",
     .no_thread = true,
     .load = load_run,