feat(client/v2): factory (backport #20623)

[mergify]

Description

Ref:
#18580
#19738

Closes:
#19433

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Summary by CodeRabbit

• New Features

  • Introduced new methods KeyType and KeyInfo to the keyring interface for retrieving key type and key information.
  • Added functionality for retrieving account details necessary for transaction signing.
  • Implemented a comprehensive transaction handling system, including tools for generating, signing, and broadcasting transactions.
  • Added functions for managing transaction parameters, including gas and fee configurations.

• Improvements

  • Enhanced keyring initialization by accepting an address codec parameter.
  • Introduced utility functions for handling coin-related operations, including parsing and normalization.
  • Improved transaction flag management with flexible gas settings.

• Bug Fixes

  • Addressed keyring initialization issues by modifying the sign function.

• Tests

  • Added various test functions related to transaction preparation, building unsigned transactions, gas calculations, and transaction simulations.

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This is an automatic backport of pull request #20623 done by [Mergify](https://mergify.com).

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