Move rtic macros to repo root, tune xtask

rtic-macros/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+authors = [
+  "The Real-Time Interrupt-driven Concurrency developers",
+  "Emil Fresk <emil.fresk@gmail.com>",
+  "Henrik Tjäder <henrik@tjaders.com>",
+  "Jorge Aparicio <jorge@japaric.io>",
+  "Per Lindgren <per.lindgren@ltu.se>",
+]
+categories = ["concurrency", "embedded", "no-std", "asynchronous"]
+description = "Procedural macros, syntax parsing, and codegen of the RTIC crate"
+documentation = "https://rtic-rs.github.io/rtic/api/rtic"
+edition = "2021"
+keywords = ["arm", "cortex-m", "risc-v", "embedded", "async", "runtime", "futures", "await", "no-std", "rtos", "bare-metal"]
+license = "MIT OR Apache-2.0"
+name = "rtic-macros"
+readme = "../../README.md"
+repository = "https://github.com/rtic-rs/rtic"
+
+version = "2.0.0-alpha.0"
+
+[lib]
+proc-macro = true
+
+[features]
+default = []
+debugprint = []
+# list of supported codegen backends
+thumbv6 = []
+thumbv7 = []
+# riscv-clic = []
+# riscv-ch32 = []
+
+[dependencies]
+indexmap = "1.9.2"
+proc-macro2 = "1.0.49"
+proc-macro-error = "1.0.4"
+quote = "1.0.23"
+syn = { version = "1.0.107", features = ["extra-traits", "full"] }
+
+[dev-dependencies]
+trybuild = "1.0.73"