feat: write quarto assignment with encryption

Cargo.toml

@@ -17,10 +17,6 @@ path = "src/main.rs"
 name = "coursebank"
 path = "src/lib.rs"
 
-[features]
-default = ["parquet"]
-parquet = ["dep:parquet", "dep:arrow-array", "dep:arrow-schema"]
-
 [dependencies]
 clap = { version = "4", features = ["derive"] }
 csv = "1"
@@ -29,9 +25,14 @@ serde_json = "1"
 serde_yaml_ng = "0.10"
 thiserror = "2"
 
-arrow-array = { version = "55", optional = true }
-arrow-schema = { version = "55", optional = true }
-parquet = { version = "55", optional = true }
+arrow-array = { version = "55"}
+arrow-schema = { version = "55"}
+parquet = { version = "55"}
+aes-gcm = { version = "0.10"}
+pbkdf2 = { version = "0.12", default-features = false, features = ["hmac"]}
+sha2 = { version = "0.10"}
+base64 = { version = "0.22"}
+getrandom = { version = "0.2"}
 
 [profile.release]
 opt-level = 3