chore: add missing crate descriptions

Author: brianheineman

postgresql_archive/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 authors.workspace = true
 categories.workspace = true
+description = "A library for downloading and extracting PostgreSQL archives"
 edition.workspace = true
 keywords.workspace = true
 license.workspace = true

postgresql_archive/README.md

@@ -8,7 +8,7 @@
 
 ---
 
-Provides utilities to work with PostgreSQL installation archives from
+A library for downloading and extracting PostgreSQL archives from
 [theseus-rs/postgresql-binaries](https://github.com/theseus-rs/postgresql-binaries).
 
 ## Examples

postgresql_embedded/Cargo.toml

@@ -2,6 +2,7 @@
 authors.workspace = true
 build = "build/build.rs"
 categories.workspace = true
+description = "Embed PostgreSQL in Rust applications"
 edition.workspace = true
 keywords.workspace = true
 license.workspace = true