## Add Conviction Voting Precompile
This PR introduces a new EVM precompile for conviction voting
functionality, enabling smart contracts to interact with the Substrate
conviction voting pallet.
### Key Changes
- **New Precompile**: Added `ConvictionVotingPrecompile` at address
`0x0000000000000000000000000000000000000812` (2066)
- **Solidity Interface**: Complete Solidity interface
(`ConvictionVoting.sol`) with all conviction voting operations
- **Runtime Integration**: Integrated precompile across all runtime
configurations (mainnet, testnet, stagenet)
- **Comprehensive Testing**: Inherits test suite from Moonbeam
### Features
- Vote casting with different conviction levels (None, Locked1x-6x)
- Vote delegation and undelegation
- Poll management and tallying
- Support for all conviction voting pallet operations
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Co-authored-by: Ahmad Kaouk <56095276+ahmadkaouk@users.noreply.github.com>
Co-authored-by: Steve Degosserie <723552+stiiifff@users.noreply.github.com>
