Update mac_core for publish

Author: CraftSpider

crates/mac_core/Cargo.toml

@@ -5,6 +5,13 @@ name = "tectonic_mac_core"
 license = "MIT"
 version = "0.0.0-dev.0"
 edition = "2021"
+description = """
+Exposing macOS framework APIs to the Tectonic Rust code.
+"""
+homepage = "https://tectonic-typesetting.github.io/"
+documentation = "https://docs.rs/tectonic_mac_core"
+repository = "https://github.com/tectonic-typesetting/tectonic/"
+readme = "README.md"
 
 [dependencies]
 libc = "0.2"

crates/mac_core/README.md

@@ -0,0 +1,10 @@
+# The `tectonic_mac_core` create
+
+This crate is part of
+[the Tectonic project](https://tectonic-typesetting.github.io/en-US/). It exposes
+macOS frameworks into Rust code in a safe manner.
+
+[![](http://meritbadge.herokuapp.com/tectonic_mac_core)](https://crates.io/crates/tectonic_mac_core)
+
+- [API documentation](https://docs.rs/tectonic_mac_core/).
+- [Main Git repository](https://github.com/tectonic-typesetting/tectonic/).