Add workspace and move bin to bdk-ffi-bindgen package

Cargo.toml

@@ -4,6 +4,10 @@ version = "0.4.1"
 authors = ["Steve Myers <steve@notmandatory.org>", "Sudarsan Balaji <sudarsan.balaji@artfuldev.com>"]
 edition = "2018"
 
+[workspace]
+members = [".","bdk-ffi-bindgen"]
+default-members = [".", "bdk-ffi-bindgen"]
+
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [lib]
 crate-type = ["staticlib", "cdylib"]
@@ -17,13 +21,6 @@ rusqlite = { version = "0.25.3", features = ["bundled"] }
 
 uniffi_macros = { version = "0.16.0", features = ["builtin-bindgen"] }
 uniffi = { version = "0.16.0", features = ["builtin-bindgen"] }
-thiserror = "1.0"
-anyhow = "=1.0.45" # remove after upgrading to next version of uniffi
-uniffi_bindgen = "0.16.0"
-structopt = "0.3"
 
 [build-dependencies]
 uniffi_build = { version = "0.16.0", features = ["builtin-bindgen"] }
-
-[[bin]]
-name = "generate-bindings"