Add tutorial: Building an Omni-Wallet ATM API

[Copilot]

Description

Adds comprehensive tutorial demonstrating how to build a multi-channel wallet API with ATM operations using Architect's serverless primitives.

Tutorial covers:

• DynamoDB schema design for wallets and transaction ledger
• RESTful endpoints for balance checks and withdrawals
• Atomic transaction handling via transactWrite to prevent race conditions
• Security patterns (credential handling, status validation, audit trails)

Key implementation patterns:

// Atomic withdrawal with optimistic locking
await data._client.transactWrite({
  TransactItems: [
    {
      Update: {
        TableName: data.wallets.name,
        Key: { userId },
        UpdateExpression: 'SET balance = :newBalance',
        ConditionExpression: 'balance = :currentBalance AND #status = :active',
        // Prevents concurrent modifications and validates wallet state
      }
    },
    {
      Put: {
        TableName: data.transactions.name,
        Item: { transactionId, userId, type: 'withdrawal', amount, ... }
        // Ensures audit trail is created atomically with balance update
      }
    }
  ]
})

Files changed:

• src/views/docs/en/:tutorials/omni-wallet-atm.md - New tutorial
• scripts/dictionary.txt - Added domain terms (ATM, omni-wallet, DynamoDB API names)
• package-lock.json - Lockfile update from dependency install

Screenshot:

Checklist

• Forked the repo and created your branch from main
• Made sure tests pass (run npm it from the repo root)
• Updated relevant documentation internal to this repo (e.g. readme.md, help docs, inline docs & comments, etc.)
• Linked to any related issues, PRs, etc. below that may relate to, consume, or necessitate these changes

Warning

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• https://api.github.com/graphql
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