Add shell script for prod deployments + modify Makefile accordingly

[portdeveloper]

Hello!

This PR:

-> adds a shell script to give the user a menu for selecting a keystore when deploying to any network other than the local anvil node
-> modifies the makefile to pass in the RPC_URL from the foundry.toml file to the shell script
-> works in linux and macos, since foundry does not work on windows natively, windows is ignored. So we should test this on: linux + wsl + macos
-> removes the need to modify the .env file when changing keystores to use

Possible To-Do:

-> ‘—keystore’ flag (thx to Shiv for the suggestion) I have some working code on this, but it accepts variables like this:
yarn deploy --network sepolia my-keystore
instead of
yarn deploy --network sepolia --keystore my-keystore
We can also introduce a new script as I couldn't find how to achieve this without doing so. Tried passing in another flag in the package.json, but did not work.

[technophile-04]

Hey port thanks for this!! Can you please resolve the merge conflicts we did some tweaks in #1011 🙌

[portdeveloper]

Hey ofc! Will work on this today!

[portdeveloper]

Will do some more testing + UX improvements and ask for your review!

[portdeveloper]

Alright now we get:
-> a direct deployment to the local chain when we run yarn deploy
-> a menu in the console when we do a yarn deploy --network sepolia

-> a direct deployment to the specified chain with the specified keystore when we do a yarn deploy --network sepolia --keystore zort (I remember @technophile-04 suggesting this somewhere)

1223.4.mp4

Also the deploy-verify target in the Makefile is unreachable I think 🤔