store `ABI` records on its own table

[pikonha]

Feature Request

Since ENS doesn't have the concept of reserved keys on the texts table, we need to decouple the ABI from the texts table.

Describe Preferred Solution

• Create a ABI table
• Remove the ABI reserved key from the texts database
• Redirect setABI calls to the newly created table

QA Replication steps

1. Create a 2LD (e.g techno.eth)
2. Set its resolver to be the database resolver
3. Set a ABI record through the ABIResolver interface:

function setABI(
    bytes32 node,
    uint256 contentType,
    bytes calldata data
)

4. Check whether this record is being correctly fetched

[pikonha]

haven't really found any usage of this on mainnet/sepolia, and it is taking a bit longer than expected to accomplish this. that said, I'm gonna deprioritize this in favor of #221