Add OG `safe-tx-hashes-util`

[pcaversaccio]

I don't understand why in:

• https://frameworks.securityalliance.org/wallet-security/tools-&-resources.html#transaction-verification
• https://frameworks.securityalliance.org/wallet-security/secure-multisig-signing-process.html#process

my original Bash script is not recommended (and not even linked!): https://github.com/pcaversaccio/safe-tx-hashes-util

Most of the "blue chip" projects use my Bash script, including the Ethereum Foundation. I don't mind having other recommendations, to be clear, but my script is by far the most used one and also kicked off the topic around hash verifications. Furthermore, all of the other tools are forks of my work.

[pcaversaccio]

My understanding is that this happened here: #164.

[mattaereal]

I agree with this. I've been personally suggesting yours given it does not have any dependency or whatsoever, just pure bash.

Don't worry, the steward, @pinalikefruit will include it for us :). I'm positive it just disappeared in the middle of a big refactor of the contents

[pinalikefruit]

Hi @pcaversaccio,

Thanks for bringing this. You're right.

As @mattaereal suspected, it was inadvertently missed during a recent large refactor. I've already corrected this and added it back. You can see it in PR #213.

[mattaereal]

Closing this issue since we're moving forward upon agreement with all counterparts!