get userop by hash v1

[0xSulpiride]

Description

• feat: check if transaction hash exists in mempool, else fallback to finding tx hash onchain

Types of changes

What types of changes does your code introduce?
Put an x in the boxes that apply

• Bugfix (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
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Other (please describe):

Further comments (optional)

[ch4r10t33r]

LGTM