Add support for bulk processing

App output result.json changes

// single protectedData
{
  "success": boolean,
  "error"?: string,
  "protectedData"?: address,
  "isEmailValid"?: boolean
}

// protectedData bulk
{
  "success": boolean, // global success (no fail)
  "error"?: "Partial failure",
  "totalCount"?: number,
  "successCount"?: number,
  "errorCount"?: number,
  "results"?: {
    "index": number,
    "protectedData"?: address,
    "success": boolean,
    "error"?: string,
    "isEmailValid"?: boolean
  }[]
}

Callback changes:
The validation now uses 2 bits to indicate that validation was performed, and the validation result

• email valid (0b11) 0x0000000000000000000000000000000000000000000000000000000000000003
• email invalid (0b10) 0x0000000000000000000000000000000000000000000000000000000000000002
• validation not performed (0b00) 0x0000000000000000000000000000000000000000000000000000000000000000
• legacy email valid (0b01) 0x0000000000000000000000000000000000000000000000000000000000000001 is supported for backward compatibility, but not produced

tests:

• single email (valid) https://explorer.iex.ec/arbitrum-sepolia-testnet/task/0x5f21a3c09ba1ea3bd7f58b6d4e946f7c79d8137d67c28085b9c6d62f130edf63?dealTab=DETAILS
• single email (invalid detected by regexp, validation not performed) https://explorer.iex.ec/arbitrum-sepolia-testnet/task/0xba0de33be3d27716ede2c09cd511dc624172f95944283accfa2c38d636fa6096?dealTab=DETAILS
• single email (invalid disposable email detected by API) https://explorer.iex.ec/arbitrum-sepolia-testnet/task/0x226bd23f2406db9634798f0eb916b0b8dc1b4b6fe5938b73c9658201fae5a652?dealTab=DETAILS
• bulk (mixed valid + invalid) https://explorer.iex.ec/arbitrum-sepolia-testnet/task/0x7381cf9f8563ed391bcdf615254e68bdc56e346ad8fd4b234acb88b59547bb5f?dealTab=DETAILS

BREAKING CHANGE: result file renamed to result.json; single protectedData result file now contains {"success": <boolean>, "protectedData"?: <address>, "isEmailValid"?: <boolean>, "error"?: <string> }; upon error, the iapp will now exit 0 and output "success": false and "error": <string> rather than falling the task.

BEGIN_COMMIT_OVERRIDE
feat(iapp)!: add bulk processing support (#234)

BREAKING CHANGE: result file renamed to result.json; single protectedData result file now contains {"success": boolean, "protectedData"?: address, "isEmailValid"?: boolean, "error"?: string }; upon error, the iapp will now exit 0 and output "success": false and "error": string rather than falling the task.
END_COMMIT_OVERRIDE