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, 6 insertions, 0 deletions

diff --git a/doc/usage/invoke_expand.rs.lock b/doc/usage/invoke_expand.rs.lock
new file mode 100644
index 0000000..3274d77
--- /dev/null
+++ b/doc/usage/invoke_expand.rs.lock
@@ -0,0 +1,6 @@
+fn compute(x: i32) -> i32 {
+    x * 2
+}
+fn example() -> i32 {
+    { { compute(5) } }
+}