feat: implement organization multi-signature signer management dashboard

[Cjay-Cyber-2]

Description

Create a signer management dashboard allowing administrators to view, add, and remove co-signers and weight thresholds for organization multi-signature Stellar accounts.

Context & Requirements

• Display current signer addresses, weights, and master key thresholds in a clean table format using TanStack Table.
• Provide forms for proposing signer weight adjustments with Zod validation.
• Use existing design tokens and badge components.

Acceptance Criteria

• Table correctly renders signer addresses and weights.
• Add signer form validates Stellar public key format.
• Propose changes triggers confirmation modal and action flow.
• Strict TypeScript adherence with no any types.

Implementation Guidance

• Likely files to touch: src/features/multisig/SignerManagement.tsx and src/types/. Integrate with TanStack Table for sorting and pagination.

Testing & Validation

• Verify form validation states and table responsiveness across viewports.
• Run npm run typecheck && npm run lint.

Submission Guidelines

• Open a PR that includes "Closes #". Assignment is required before starting.

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Wave complexity: Medium

[ojuotimi932]

@ojuotimi932 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer Can I resolve this kindly assign

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ojuotimi932 to this issue.

[drips-wave]

Congratulations, @ojuotimi932! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @ojuotimi932: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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