Add Envio to Taiko indexing tools

[Jordy-Baby]

This adds an Envio row to the Indexing table on the Developer Tools page.

Envio is a high-performance indexing framework that turns smart contract events into a queryable GraphQL API. Its HyperIndex supports indexing any EVM chain out of the box, so developers can index Taiko (chain ID 167000) using their own RPC as the data source. Indexers can be self-hosted or run on the managed Envio Cloud service.

Website: https://envio.dev/
Docs: https://docs.envio.dev/

[Jordy-Baby]

Hey @ggonzalez94 @RogerLamTd, we'd love to have Envio listed here and I've kept it consistent with the existing providers. Let me know if you need anything else from my end.

For reference, here are Envio's performance benchmarks: https://docs.envio.dev/docs/HyperIndex/benchmarking?utm_source=taiko&utm_medium=partner-docs

[Jordy-Baby]

Gentle bump on this one. No rush at all. If any tweak to the wording, formatting or placement would help it land, just say the word and we will turn it around quickly.