Set up fuzz infrastructure

fuzz/.gitignore

@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage

fuzz/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "garage-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+arbitrary = { version = "1.4.2", features = ["derive"] }
+libfuzzer-sys = "0.4"
+
+[dependencies.garage_table]
+path = "../src/table"
+
+[dependencies.garage_model]
+path = "../src/model"
+features = ["arbitrary"]
+