Partial hardhat -> viem migration for tests.

Typescript updated to v5.
Notably all calls to p2pix.callStatic.getStr() were replaced by viem.stringToHex() due to bug in ethers (https://github.com/ethers-io/ethers.js/issues/4965)
Full migration to viem might not be possible currently due to hard-chai-matchers incompatibility:
> The hardhat-chai-matchers plugin is designed to work with hardhat-ethers. Attempting to use it in conjunction with hardhat-viem results in compatibility issues.
https://hardhat.org/hardhat-chai-matchers/docs/overview

package.json

@@ -41,7 +41,8 @@
     "@nomicfoundation/hardhat-chai-matchers": "^1.0.4",
     "@nomicfoundation/hardhat-network-helpers": "1.0.6",
     "@nomicfoundation/hardhat-toolbox": "^2.0.0",
-    "@nomiclabs/hardhat-ethers": "^2.2.1",
+    "@nomicfoundation/hardhat-viem": "^2.0.6",
+    "@nomiclabs/hardhat-ethers": "^2.2.3",
     "@nomiclabs/hardhat-etherscan": "^3.1.2",
     "@trivago/prettier-plugin-sort-imports": "^3.4.0",
     "@typechain/ethers-v5": "^10.1.1",
@@ -65,14 +66,12 @@
     "hardhat": "^2.12.2",
     "hardhat-contract-sizer": "^2.8.0",
     "hardhat-gas-reporter": "^1.0.9",
-    "hardhat-tracer": "beta",
     "husky": "^8.0.1",
     "keccak256": "^1.0.6",
     "lint-staged": "^13.0.3",
     "lodash": "^4.17.21",
     "merkletreejs": "^0.2.32",
     "mocha": "^10.1.0",
-    "pinst": "^3.0.0",
     "prettier": "^2.7.1",
     "prettier-plugin-solidity": "^1.0.0-rc.1",
     "shx": "^0.3.4",
@@ -83,7 +82,8 @@
     "ts-generator": "^0.1.1",
     "ts-node": "^10.9.1",
     "typechain": "^8.1.1",
-    "typescript": "^4.8.4"
+    "typescript": "^5",
+    "viem": "^2.23.14"
   },
   "files": [
     "/contracts"