Fix license and add metadata

Author: fowles

Cargo.toml

@@ -1,7 +1,15 @@
 [package]
 name = "pratdiff"
+description = "A colorfull diff tool based on the patience diff algorithm"
+repository = "https://github.com/fowles/pratdiff"
 version = "0.1.0"
 edition = "2021"
+license-file = "LICENSE.md"
+keywords = ["diff", "patience"]
+categories = ["command-line-utilities", "development-tools", "filesystem"]
+exclude = [
+    "src/testdata",
+]
 
 [dependencies]
 anstream = "0.6.14"

LICENSE.md

@@ -187,7 +187,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2024 Matt Kulukundis
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.