feat: Add support for SPL Governance Voting Operations

[Rudrakc]

This PR introduces support for SPL Governance program voting operations in the Solana Agent Kit, enabling programmatic management of DAO governance activities.

Features Added:

1. Cast Votes on Active Proposals:

• Added castProposalVote function for submitting votes on governance proposals.
• Supports "yes" and "no" vote types.

2. Track Voting Power:

• Added trackVotingPower function to fetch the voting power of a specific token owner in a realm.
• Returns the governing token deposit amount.

3. Manage Vote Delegation:

• Added manageVoteDelegation function to assign or update governance delegates for token owners in a realm.

4. Monitor Voting Outcomes:

• Added monitorVotingOutcomes function to track the current state of a governance proposal.
• Provides real-time updates on proposal outcomes.

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How It Works:

1. Cast Votes:

• Submits a transaction using SPL Governance’s withCastVote helper.
• Confirms the transaction with sendAndConfirmTransaction.

2. Track Voting Power:

• Retrieves the governing token deposit amount from the TokenOwnerRecord.

3. Manage Vote Delegation:

• Sets or updates the governance delegate using SPL Governance’s withSetGovernanceDelegate helper.
• Executes the delegation transaction with sendAndConfirmTransaction.

4. Monitor Voting Outcomes:

• Fetches the proposal's state using SPL Governance’s getProposal helper.
• Returns a human-readable state (e.g., Voting, Succeeded, Defeated).

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Linked Issues:

Closes #165

This pull request was created for https://app.gib.work/bounties/5acb3e1e-b316-4c14-a9d5-c6d6a87496fa in an attempt to solve a bounty #165 . Payment for the bounty is immediately sent to the contributor after merge.

[abrzezinski94]

Hi please upload screenshots from testing