feat: encryp wallet with name(address) api.

[mtroym]

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• I have added tests that prove my fix is effective or that my feature works.
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[mtroym]

hereby invite @digorithm @iqdecay @hal3e to review my pr. thanks.

[MujkicA]

I would suggest you move the name parameter to the existing encrypt method.
Also I would remove the test since it's just a wrapper for eth_keystore::encrypt_key

[mtroym]

I would suggest you move the name parameter to the existing encrypt method. Also I would remove the test since it's just a wrapper for eth_keystore::encrypt_key

Great, will update later. thanks.