Add early support for nested types (like struct and list<struct>) (#69)

* Convert struct type to record

* Refactor and encode struct types

* Use psuedo type for composite

* Revert "Use psuedo type for composite"

This reverts commit 4313e41.

* Fix

* Add type integration test

* encode struct in quote

* Fix test

* Fix

* Fix

* Fix

* Don't recreate parquet file in the test run

Author: trueleo

.gitignore

@@ -1,3 +1,4 @@
 /target
 .direnv
 .envrc
+.vscode

Cargo.lock

@@ -16,12 +16,14 @@ readme = "../README.md"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-pgwire = { workspace = true }
-datafusion = { workspace = true }
-tokio = { version = "1.45", features = ["sync"] }
 arrow = "54.2.0"
-futures = "0.3"
 async-trait = "0.1"
-log = "0.4"
+bytes = "1.10.1"
 chrono = { version = "0.4", features = ["std"] }
+datafusion = { workspace = true }
+futures = "0.3"
+log = "0.4"
+pgwire = { workspace = true }
+postgres-types = "0.2"
 rust_decimal = { version = "1.37", features = ["db-postgres"] }
+tokio = { version = "1.45", features = ["sync"] }