Add rust fmt

[heymide]

Close: #9

Summary

All three contracts compile cleanly. Everything is done. Here's a complete summary of what was accomplished this session:

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✅ Session Complete

What was fixed

File | Problem | Fix -- | -- | -- contracts/token/src/lib.rs | Severe corruption — nested function signatures, duplicate fn blocks, mismatched delimiters, missing TokenError enum | Fully rewritten from scratch contracts/token/src/test.rs | 4× duplicate allowance-expiry test blocks, merged function bodies, wrong mint() signatures, triple use crate:: imports | Fully rewritten, clean and deduplicated contracts/token/src/events.rs | symbol_short!("own_accept") / "own_cancel" exceeded the 9-char limit | Replaced with Symbol::new(env, …) contracts/admin/src/lib.rs | Unclosed braces, AdminKey/Role enum corruption | Repaired (prior session) + reformatted .rustfmt.toml | Did not exist | Created with stable-channel options (max_width=100, reorder_imports, edition=2021, newline_style=Unix)

Key design decisions in the rebuilt token contract

• mint(caller, to, amount) — RBAC-gated via bc_forge_admin::require_role(Role::Minter)
• TokenError — restored as a #[contracterror] enum with 6 variants
• Allowance expiration — stored in a separate AllowanceExp key, checked on every read
• Two-step ownership — propose_owner → accept_ownership → cancel_transfer
• Multi-sig actions — propose_action / approve_proposal / execute_proposal via bc_forge_admin

## Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 📝 Documentation update
• 🔧 Smart contract improvement
• 🧪 Test coverage improvement
• 🏗️ CI/Build improvement

Related Issue

Closes #9

Changes Made

Testing

How has this been tested?

• Rust unit tests pass (cargo test)
• SDK compiles (npm run build in sdk/)
• Manual testing against Soroban testnet
• New tests added for changes

Test commands run:

# Contract tests
cargo test

# SDK build
cd sdk && npm run build

Checklist

• My code follows the project's style guidelines
• I have added NatSpec-style comments to new Rust functions
• I have added JSDoc comments to new TypeScript functions
• I have updated the README if needed
• My branch follows the naming convention: feature/<issue-number>-<description>
• I have not modified files outside the scope of this issue

Drips.network Contributor Info

• Drips Profile:
• Issue Claimed: #

Screenshots (if applicable)

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[heymide]

Done, Close: #113