Support for building FALs (Flipper App Libraries)

[str4d]

Mentioned in the Firmware 1.0 Release blog post:

What’s new in the NFC subsystem

• Parsers are now dynamic: Initially, card data parsers were integrated into the NFC app and loaded into RAM along with it, which occasionally caused a lack of RAM. Now, parsers are FALs (Flipper App Library) that can be loaded one by one. Community members can add support for their card types by creating parsers by implementing a simple interface. See the code on GitHub.

In the same way that we enable easily building and deploying FAPs with cargo, it would be great to also enable easily building FALs.