Linux/mac self updating fixed

mac and linux builds should be able to self update, now.
note: the linux x64 binary has been renamed to pocket_updater
also merged the branch with the core replacement stuff, in case that ever gets use

What's Changed

• use parameters to get index of platform_id for data_slot by @mattpannella in #202
• Core substitute by @mattpannella in #172
• self updating fix by @mattpannella in #203
• set filename in publish command by @mattpannella in #204
• wooooops by @mattpannella in #205

Full Changelog: 2.38.1...2.40.1