Added README

README.md

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+# Munsikka Mod Manager
+
+Linux-compatible alternative for the thunderstore overwolf mod manger or whatever it is called.
+
+Currently only handles Lethal Company profiles. Just pop in the profile UUID as the first argument to the program and see it run. Be sure to search the code for the `GAME_DIR` environment variable if you are not using a standard steam installation directory.
+
+This will mercilessly delete your current mods.
+
+Usage with cargo:
+
+```
+cargo run -- <uuid>
+```
+
+or with binary
+
+```
+munsikka <uuid>
+```
+
+![screenshot](docs/screenshot.png "Screenshot")