change format for mod jars

- remove raw jars
- replace with modrinth.index.json
=> + save storage space and network bandwidth
=> - building is now more complicated

client/overrides/config/modernfix-mixins.properties

@@ -0,0 +1,12 @@
+mixin.bugfix.chunk_deadlock=true
+mixin.bugfix.packet_leak=true
+mixin.bugfix.paper_chunk_patches=true
+mixin.perf.clear_fabric_mapping_tables=true
+mixin.perf.clear_mixin_classinfo=true
+mixin.perf.deduplicate_location=true
+mixin.perf.dynamic_entity_renderers=true
+mixin.perf.dynamic_resources=true
+mixin.perf.faster_item_rendering=true
+mixin.perf.nbt_memory_usage=true
+mixin.perf.remove_spawn_chunks=true
+mixin.perf.thread_priorities=false