Adds ExtensionType for Parquet geospatial WKB arrays

 - Implements the ExtensionType for Parquet geospatial logical types
 - Adds GeoArrow compatible Metadata type to hold geospatial metadata
 - Adds basic tests around geospatial metadata
   serialization/deserialization
 - Integrates geospatial logical type parsing into schema extensions

Author: BlakeOrth

parquet-geospatial/Cargo.toml

@@ -29,8 +29,11 @@ edition = { workspace = true }
 rust-version = { workspace = true }
 
 [dependencies]
+arrow = { workspace = true }
 arrow-schema = { workspace = true }
 geo-traits = { version = "0.3" }
+serde = { version = "1.0", default-features = false, features = ["derive"]}
+serde_json = { version = "1.0", default-features = false, features = ["std"]}
 wkb = { version = "0.9.1" }
 
 [dev-dependencies]

parquet-geospatial/src/lib.rs

@@ -30,3 +30,9 @@
 pub mod bounding;
 pub mod interval;
 pub mod testing;
+
+mod types;
+
+pub use types::Hint as WkbTypeHint;
+pub use types::Metadata as WkbMetadata;
+pub use types::WkbType;