feat: scaffold crate structure and implement core macros

Add the project skeleton, LICENSE files, README, Makefile, doc
examples, and the initial implementation of `#[func]`, `invoke!`,
and `select!` procedural macros.

1 files changed, 290 insertions, 0 deletions

diff --git a/test/Cargo.lock b/test/Cargo.lock
new file mode 100644
index 0000000..5d4be76
--- /dev/null
+++ b/test/Cargo.lock
@@ -0,0 +1,290 @@
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