add foundry to CI

.github/workflows/ci.yml

@@ -113,6 +113,9 @@ jobs:
         run: |
           rustup update stable && rustup default stable
 
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+
       - name: Cache Cargo registry
         uses: actions/cache@v4
         with:

README.md

@@ -1,2 +1,12 @@
 # walletkit
+
 WalletKit enables wallets to use World ID.
+
+## Tests
+
+To run all tests Foundry is required. Anvil is used for functional tests with Solidity.
+
+```bash
+curl -L https://foundry.paradigm.xyz | bash
+foundryup
+```

cspell.json

@@ -5,6 +5,8 @@
   "ignorePaths": ["Cargo.toml"],
   "words": [
     "aarch",
+    "clippy",
+    "foundryup",
     "ruint",
     "Uniffi",
     "WalletKit",