firmware: Remove the c attempt of the firmware

firmware/Cargo.toml

@@ -0,0 +1,35 @@
+[package]
+name = "clock-generator"
+version = "0.1.0-dev"
+edition = "2021"
+license = "GPL-3.0-or-later"
+
+[[bin]]
+name = "clock-generator"
+test = false
+bench = false
+
+[dependencies]
+panic-halt = "0.2"
+nb = "1"
+embedded-hal = "0.2"
+avr-device = { version = "0.5", features = ["atmega328p"] }
+si5351 = "0.2"
+
+[dependencies.atmega-hal]
+git = "https://github.com/rahix/avr-hal"
+branch = "main"
+features = ["atmega328p", "rt"]
+
+[profile.dev]
+panic = "abort"
+codegen-units = 1
+lto = true
+opt-level = "s"
+
+[profile.release]
+panic = "abort"
+codegen-units = 1
+debug = true
+lto = true
+opt-level = "s"