feat(pathf): add build-time type path resolution system

Add `mingling_pathf` sub-crate and `pathf` feature for automatic
resolution of Mingling type module paths at build time. Scans source
files, identifies macro invocations via pattern matchers, and generates
mapping files consumed by `gen_program!()`.

1 files changed, 17 insertions, 0 deletions

diff --git a/mingling_pathf/test/src/test_files/test_pack.rs b/mingling_pathf/test/src/test_files/test_pack.rs
new file mode 100644
index 0000000..759e35f
--- /dev/null
+++ b/mingling_pathf/test/src/test_files/test_pack.rs
@@ -0,0 +1,17 @@
+mingling::macros::pack!(ResultPack1 = String);
+mingling::macros::pack_err!(ErrorPack1);
+mingling::macros::pack_err!(ErrorPack2 = PathBuf);
+
+pack!(ResultPack2 = (u8, String));
+pack_err!(ErrorPack3);
+pack_err!(ErrorPack4 = PathBuf);
+
+pub mod sub {
+    mingling::macros::pack!(ResultPack1 = String);
+    mingling::macros::pack_err!(ErrorPack1);
+    mingling::macros::pack_err!(ErrorPack2 = PathBuf);
+
+    pack!(ResultPack2 = (u8, String));
+    pack_err!(ErrorPack3);
+    pack_err!(ErrorPack4 = PathBuf);
+}