ops: set explicit send/receive libs on legacy OFTs

- Add SetLegacyOFTLibs forge script + README
- Add Safe batch JSONs for Metis, Blast, Base, and Ethereum msigs
- Update Blast msig URL in README

Author: dhruvinparikh

README.md

@@ -24,7 +24,7 @@ This repository contains all of the contracts and deployment code used to manage
   - `Ethereum`
     - [OFT Admin](https://app.safe.global/home?safe=eth:0xB1748C79709f4Ba2Dd82834B8c82D4a505003f27)
     - [Hop Admin](https://app.safe.global/home?safe=eth:0x6cCF3F2Ca29591F90ADB403D67E4dcB49cEcC634)
-  - [`Blast`](https://console.brahma.fi/account/0x33a133020b2c2cd41a24f74033b11ec2fc0bf97a)
+  - [`Blast`](https://app.safe.protofire.io/home?safe=blastmainnet:0x33A133020b2C2CD41a24F74033B11EC2fC0bF97a)
   - [`Metis`](https://metissafe.tech/home?safe=metis-andromeda:0xF4A4F32732F9B2fB84Ee28c58616946F3bF80F7d)
   - [`Base`](https://app.safe.global/home?safe=base:0xCBfd4Ef00a8cf91Fd1e1Fe97dC05910772c15E53)
   - [`Mode`](https://safe.optimism.io/home?safe=mode:0x6336CFA6eDBeC2A459d869031DB77fC2770Eaa66)