add export presets to git

.gitignore

@@ -1,5 +1,4 @@
 # Godot-specific ignores
 .import/
 export.cfg
-export_presets.cfg
 *.blend1

src/export_presets.cfg

@@ -0,0 +1,24 @@
+[preset.0]
+
+name="Linux/X11"
+platform="Linux/X11"
+runnable=true
+custom_features=""
+export_filter="all_resources"
+include_filter=""
+exclude_filter=""
+export_path=""
+script_export_mode=1
+script_encryption_key=""
+
+[preset.0.options]
+
+custom_template/debug=""
+custom_template/release=""
+binary_format/64_bits=true
+binary_format/embed_pck=false
+texture_format/bptc=false
+texture_format/s3tc=true
+texture_format/etc=false
+texture_format/etc2=false
+texture_format/no_bptc_fallbacks=true