SFT-3538: Add foundation-firmware crate.

* Cargo.toml (workspace.dependencies): Add nom and secp256k1.
* firmware/Cargo.toml: New cargo package.
* firmware/src/lib.rs: New library file.

Cargo.toml

@@ -7,6 +7,7 @@ members = [
     "arena",
     "codecs",
     "ffi",
+    "firmware",
     "test-vectors",
     "ur",
     "urtypes",
@@ -30,8 +31,10 @@ hex = { version = "0.4.2", default-features = false }
 itertools = { version = "0.10", default-features = false }
 libfuzzer-sys = "0.4"
 minicbor = { version = "0.20", features = ["derive"] }
+nom = { version = "7", default-features = false }
 phf = { version = "0.11", features = ["macros"], default-features = false }
 rand_xoshiro = "0.6"
+secp256k1 = { version = "0.28", default-features = false }
 serde = { version = "1.0.156", features = ["derive"] }
 serde_json = "1"
 uuid = { version = "1", default-features = false }

firmware/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "foundation-firmware"
+version = "0.1.0"
+description = "Firmware image format"
+edition = "2021"
+license = "GPL-3.0-or-later AND GPL-3.0-only"
+
+[dependencies]
+bitcoin_hashes = { workspace = true }
+nom = { workspace = true }
+secp256k1 = { workspace = true }