fix: all wallet flows to use ethers (#395)

* fix: all wallet flows to use only ethers libraries

* feat: remove ethereumjs-wallet

* fix: remove the buggy `/wallet` bee call and use provider

package.json

@@ -40,7 +40,6 @@
     "buffer": "^6.0.3",
     "crypto": "npm:crypto-browserify",
     "crypto-browserify": "^3.12.0",
-    "ethereumjs-wallet": "^1.0.2",
     "ethers": "^5.6.4",
     "file-saver": "^2.0.5",
     "formik": "2.2.9",