feat: add certora CI integration (#10)

This adds a new command to package.json `verify` which can be run via
`pnpm verify`.

The command runs the certora CLI with a config file which has to be
adjusted for every individual project.

The commit also adds a dedicated task to our github actions, which
ensures, verification is done in every PR as well.

package.json

@@ -23,7 +23,8 @@
   "scripts": {
     "clean": "rm -rf cache out",
     "lint": "pnpm lint:sol && pnpm prettier:check",
-    "lint:sol": "forge fmt --check && pnpm solhint {script,src,test}/**/*.sol",
+    "verify": "certoraRun certora/certora.conf",
+    "lint:sol": "forge fmt --check && pnpm solhint {script,src,test,certora}/**/*.sol",
     "prettier:check": "prettier --check **/*.{json,md,yml} --ignore-path=.prettierignore",
     "prettier:write": "prettier --write **/*.{json,md,yml} --ignore-path=.prettierignore"
   }