add linter, prettier and husky

.gitignore

@@ -2,3 +2,4 @@ cache/
 node_modules
 .vscode
 .env
+out

.husky/.gitignore

@@ -0,0 +1 @@
+_

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+ npm run prettier && npm run lint && forge build 

.prettierrc.json

@@ -0,0 +1,10 @@
+{
+  "overrides": [
+    {
+      "files": "*.sol",
+      "options": {
+        "compiler": "0.8.15"
+      }
+    }
+  ]
+}

.solhint.json

@@ -0,0 +1,54 @@
+{
+  "extends": "solhint:recommended",
+  "plugins": ["prettier"],
+  "rules": {
+    "prettier/prettier": "error",
+    "code-complexity": ["error", 6],
+    "function-max-lines": ["error", 65],
+    "max-line-length": ["error", 250],
+    "no-empty-blocks": "error",
+    "no-unused-vars": "error",
+    "payable-fallback": "off",
+    "reason-string": [
+      "off",
+      {
+        "maxLength": 32
+      }
+    ],
+    "constructor-syntax": "off",
+    "comprehensive-interface": "off",
+    "quotes": ["error", "double"],
+    "const-name-snakecase": "error",
+    "contract-name-camelcase": "error",
+    "event-name-camelcase": "warn",
+    "func-name-mixedcase": "warn",
+    "func-param-name-mixedcase": "error",
+    "modifier-name-mixedcase": "error",
+    "var-name-mixedcase": "error",
+    "imports-on-top": "error",
+    "ordering": "error",
+    "visibility-modifier-order": "error",
+    "avoid-call-value": "off",
+    "avoid-low-level-calls": "off",
+    "avoid-sha3": "error",
+    "avoid-suicide": "error",
+    "avoid-throw": "error",
+    "avoid-tx-origin": "off",
+    "check-send-result": "error",
+    "compiler-version": ["error", "0.8.15"],
+    "mark-callable-contracts": "off",
+    "func-visibility": [
+      "error",
+      {
+        "ignoreConstructors": true
+      }
+    ],
+    "multiple-sends": "error",
+    "no-complex-fallback": "error",
+    "no-inline-assembly": "off",
+    "not-rely-on-block-hash": "error",
+    "not-rely-on-time": "error",
+    "reentrancy": "error",
+    "state-visibility": "error"
+  }
+}

.solhintignore

@@ -0,0 +1,2 @@
+node_modules/
+contracts/test