refactor(Bundler): clean up documentation, parameter names and types

[varunsrin]

Motivation

Make Bundler contract easier to audit and understand, improve trustedBatchRegister functionality to cover all migration types.

Change Summary

See PR Codex below for a full list of changes.

Merge Checklist

• [x] The PR title adheres to the conventional commits standard
• [x] The PR has been tagged with change type label(s) (i.e. documentation, feature, bugfix, or chore)
• [x] The PR's changes adhere to all the requirements in the contribution guidelines
• [x] This PR does not require changes to the Farcaster protocol

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PR-Codex overview

This PR focuses on changing the function name changeTrustedCaller to setTrustedCaller in the IdRegistry and Bundler contracts. It also updates the corresponding event names and adds a recovery parameter to the UserData struct.

Detailed summary

• Renamed changeTrustedCaller function to setTrustedCaller in IdRegistry and Bundler contracts.
• Updated event names from ChangeTrustedCaller to SetTrustedCaller in IdRegistry and Bundler contracts.
• Added recovery parameter to UserData struct in Bundler contract.

The following files were skipped due to too many changes: src/Bundler.sol

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[github-actions[bot]]

Coverage after merging varunsrin/bundler-cleanup into main will be

98.79%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
Bundler.sol	94.12%	83.33%	100%	100%	151, 153
FnameResolver.sol	96.30%	75%	100%	100%	121
IdRegistry.sol	97.30%	100%	92.31%	97.44%	315
StorageRent.sol	98.85%	98.44%	100%	98.90%	468, 470