Introduce a smoke tester

The smoke tester runs PS battles and compares the damage rolls to the
calc's. If they don't match, it will print the output to `logs/`.
The smoke tester can then be re-ran with the log filename as a CLI
argument and it will report each failure in detail.

This is still a WIP as can be seen by the TODO comments but it works
decently enough now that I decided to commit it to the repo.

.gitignore

@@ -1,6 +1,8 @@
 dist/
+logs/
 node_modules/
 eslint-cache/
+.tsbuildinfo
 .eslintcache
 .DS_Store
 Thumbs.db

smoketest/.eslintrc

@@ -0,0 +1,13 @@
+{
+  "root": true,
+  "extends": "@pkmn",
+  "rules": {
+    "max-len": [
+      "error", {
+        "code": 100,
+        "ignorePattern": "^\\s*['\"`/]"
+      }
+    ],
+	 "@typescript-eslint/no-floating-promises": ["error", {"ignoreVoid": true}]
+  }
+}