Initial node implementation (#4)

Reviewed-on: #4
Co-authored-by: Zack <zack@bfpower.io>
Co-committed-by: Zack <zack@bfpower.io>

macros/node-poll-variants/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "node-poll-variants"
+description = "Macros for physical nodes."
+version.workspace = true
+edition.workspace = true
+repository.workspace = true
+readme.workspace = true
+license.workspace = true
+
+[lib]
+proc-macro = true
+
+[[test]]
+name = "tests"
+path = "tests/test_build.rs"
+
+[dependencies.syn]
+workspace = true
+[dependencies.quote]
+workspace = true
+
+[dev-dependencies.trybuild]
+workspace = true
+[dev-dependencies.physical-node]
+path = "../../node"
+features = ["embassy-sync"]
+[dev-dependencies.embassy-sync]
+workspace = true