[MEV] Implement MEV Plugin for Portal feature parity

[fredteumer]

Objective

Achieve feature parity with the Portal by implementing MEV plugin

Origin Document

Our provider, Blink, earns us a trivial amount of revenue monthly across ETH, BSC, and Base (new chains may be added after time of writing but all valid chains that Grove supports and are supported by Blink should be considered in scope).

Goals

• Create a configurable MEV plugin for path that allows us to integrate with Blink
• implement MEV on ETH
• implement MEV on Arbitrum
• implement MEV on BSC
• implement MEV on Base
• Implement MEV on Solana

Deliverables

• Per service configuration capability for MEV by inserting either by link or by chain for Blink
• Updated configuration for implementing all Blink supported chains

Non-goals / Non-deliverables

• MEV providers other than Blink
• Any other outside integrations

General deliverables

• Comments: Add/update TODOs and comments alongside the source code so it is easier to follow.
• Testing: Add new tests (unit and/or E2E) to the test suite.
• Makefile: Add new targets to the Makefile to make the new functionality easier to use.
• Documentation: Update architectural or development READMEs; use mermaid diagrams where appropriate.

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Creator: @fredteumer
Co-Owners: @ArtSabintsev