License as ISC (#1)

Open source and allow 3rd-party use of our custom rules and
configuration.

The readme has our logo and a short description:
>
![image](https://github.com/user-attachments/assets/136e6cc8-31f7-4ff2-b961-6f74ac3a11e9)

This will not yet publish the package to the public registry, that is
not necessary for now.

LICENSE.md

@@ -0,0 +1,15 @@
+# ISC License
+
+Copyright (c) 2024, QA Wolf
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

package.json

@@ -30,6 +30,7 @@
     "tsx": "^4.19.2",
     "typescript": "^5.6.3"
   },
+  "license": "ISC",
   "main": "dist/index.js",
   "name": "@qawolf/eslint-plugin",
   "peerDependencies": {