feat: use secret key from env if no wallets are present

[ermineJose]

Description

if no wallets are present, instead of throwing an error to create the wallet directly, it checks if secret key is available from env and attempts to create a wallet through that as default, if not throw an error and exit as normal workflow.

Type of Change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Other (please describe):

Checklist

Please ensure all of the following tasks have been completed:

• I have read the contributing guidelines.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have updated the documentation accordingly.
• I have followed the conventional commits guidelines for commit messages.
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