write a dump exporter

dump/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "dump"
+version = "0.29.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+index = { path = "../index" }
+uuid = { version = "1.1.2", features = ["serde", "v4"] }
+serde_json = { version = "1.0.85", features = ["preserve_order"] }
+serde = { version = "1.0.136", features = ["derive"] }
+tempfile = "3.3.0"
+flate2 = "1.0.22"
+thiserror = "1.0.30"
+time = { version = "0.3.7", features = ["serde-well-known", "formatting", "parsing", "macros"] }
+tar = "0.4.38"
+
+[dev-dependencies]
+insta = { version = "1.19.1", features = ["json", "redactions"] }