Governor: pluggable vote-weight module

[bitfalt]

📋 Description

Decouple vote-weight calculation from the governor so we can swap strategies (token balance, activity, NFT, etc.) without redeploying.

✅ Acceptance Criteria

• Add storage vote_weight_module: ContractAddress
• Add external function set_vote_weight_module(new_module: ContractAddress) restricted to DAO admin
• On every vote, call IVoteWeightModule.get_weight(voter, proposal_id) and use the returned u128
• If module returns zero or reverts, treat weight as zero (do not revert the tx)

[anonfedora]

GM, I'm proficient in Cairo, Rust, Smart contracts,
I'm willing to take on this.

Past PRs

mediolano-app/mediolano-contracts#82

mediolano-app/mediolano-contracts#65

mediolano-app/mediolano-contracts#25

[Birdmannn]

Please can I work on this issue?