Maintain existing projects

[pacu]

[pacu]

dependabot updates on ZecDev

• Critical - Bump next from 15.5.2 to 15.5.7 zecdev/zecdev.github.io#25
• Medium - Bump mdast-util-to-hast from 13.2.0 to 13.2.1 zecdev/zecdev.github.io#26

[pacu]

Create a README for lightclient-protocol

[pacu]

rebase orchard crate fork to latest main zcash/orchard#432 in an attempt to unblock RedDev team's PoC.

[pacu]

created a separate branch to unblock reddev team's FROST PoC zcash/orchard#476