feat: Batch Proposals on Etherlink DAO

[ashutoshpw]

Adds support for creating EVM DAO proposals with multiple actions via CSV upload, enabling batch operations in a single proposal.

• Add batch actions proposal type for creating multiple DAO actions in one proposal
• Implement CSV parsing and upload functionality for batch action definitions
• Support 4 action types including transfers of erc20, native tokens and mint and burn.
• Add comprehensive UI component for managing and editing batch actions

Fixes #930 #929 #928 #927 #926 #924

[netlify[bot]]

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[EightRice]

New Proposal modal for L1 is wrong in this deploy preview. @ashutoshpw