remove txt extension from meta

It was useful for debug, but should no longer be required.

Author: networkfusion

docs/65_experimental.md

@@ -7,13 +7,13 @@ See: [Controller Paks](15_controller_paks.md)
 See: [Cheats (Gameshark, etc.)](./13_datel_cheats.md)
 
 ### Rom information metadata
-To show certain (metadata) information on the N64 ROM information screen, add a `.meta.txt` file in the same directory as the game ROM file with the same ROM filename (but excluding the ROM extension i.e. [`.z64`, `.v64`, `.n64`] )
-Although the filename is `.meta.txt`, its content is based on an `ini` file.
+To show certain (metadata) information on the N64 ROM information screen, add a `.meta` file in the same directory as the game ROM file with the same ROM filename (but excluding the ROM extension i.e. [`.z64`, `.v64`, `.n64`] )
+Although the filename is `.meta`, its content is based on an `ini` file.
 
 The aim is to add full support for [https://n64brew.dev/wiki/ROM_Metadata](https://n64brew.dev/wiki/ROM_Metadata)
 
 > [!TIP]
-> A rom called `my N64 game rom.z64` will load Rom information metadata from `my N64 game rom.meta.txt`.
+> A rom called `my N64 game rom.z64` will load Rom information metadata from `my N64 game rom.meta`.
 
 and the following content under the file content header:
 

src/menu/rom_info.c

@@ -770,7 +770,7 @@ static void extract_rom_info (match_t *match, rom_header_t *rom_header, rom_info
 static void load_rom_meta_from_file (path_t *path, rom_info_t *rom_info) {
     path_t *rom_info_meta_path = path_clone(path);
 
-    path_ext_replace(rom_info_meta_path, "meta.txt");
+    path_ext_replace(rom_info_meta_path, "meta");
 
     mini_t *rom_meta_ini = mini_load(path_get(rom_info_meta_path));