Add setup script to simplify install

README.md

@@ -22,8 +22,7 @@ TODO example output
 From the same directory as this README:
 
 ```sh-session
-$ npm run build
-$ npm link
+$ npm run setup
 ```
 
 Now the `kot` command should be available on your system.

package.json

@@ -52,7 +52,8 @@
     "posttest": "npm run lint",
     "prepack": "npm run build && oclif manifest && oclif readme",
     "test": "mocha --forbid-only \"test/**/*.test.ts\"",
-    "version": "oclif readme && git add README.md"
+    "version": "oclif readme && git add README.md",
+    "setup": "npm install && npm run build && npm link"
   },
   "engines": {
     "node": ">=12.0.0"