[Bug] capabilities field incorrectly shown as array in ERC-5792 code examples

[zakaziko86]

Description

In tmp-builder-codes-outline.mdx, the capabilities field is used as an
array in all code examples:

capabilities: [{ dataSuffix }]

However, the ERC-5792 spec defines capabilities as an object (key-value
map), not an array. The correct format should be:

capabilities: {
  "erc8021": { dataSuffix }
}

Location

tmp-builder-codes-outline.mdx — multiple code examples throughout the file

Impact

• Developers following these examples will produce invalid ERC-5792 calls
• Wallets that strictly follow the spec will reject these calls
• Could cause silent attribution failures

Suggested Fix

Update all capabilities examples to use the correct object format as
defined in the ERC-5792 specification.