feat: introduce filesystem catalog (#93)

Author: luoyuxia

crates/paimon/Cargo.toml

@@ -55,3 +55,4 @@ indexmap = "2.5.0"
 [dev-dependencies]
 rand = "0.8.5"
 serde_avro_fast = { version = "1.1.2", features = ["snappy"] }
+tempfile = "3"