The build files and project documents.

This sets up the basic build for the microbit project. The documentation
needed to code against it has been assembled in the documents directory.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "microbadge"
-version = "0.0.0"
+version = "0.1.0"
 edition = "2021"
 description = "MicroBadge is a software application suite for the BBC micro:bit v2, designed as a digital conference badge."
 repository = "/myrddin/microbadge"
@@ -11,3 +11,28 @@ license = "Apache-2.0"
 
 
 [dependencies]
+defmt = "1.0.1"
+defmt-rtt = "1.0.0"
+
+panic-probe = { version = "1.0.0", features = ["defmt", "defmt-error",
+                                               "print-defmt"] }
+
+cortex-m = { version = "0.7.7", features = ["critical-section-single-core"] }
+cortex-m-rt = { version = "0.7.5" }
+
+embassy-nrf = { version = "0.3.1", features = ["nrf52833", "time",
+                                               "time-driver-rtc1", "gpiote",
+                                               "defmt"] }
+embassy-executor = { version = "0.7.0", features = ["arch-cortex-m",
+                                                    "executor-thread",
+                                                    "task-arena-size-65536",
+                                                    "defmt"] }
+embassy-sync = { version = "0.6.2", features = ["defmt"] }
+embassy-time = { version = "0.4.0", features = ["defmt",
+                                                "defmt-timestamp-uptime"] }
+embassy-futures = { version = "0.1.1", features = ["defmt"] }
+
+
+
+[profile.release]
+lto = true