Speed up brute force building with Prey.lock hashing and caching.

crates/core/src/error.rs

@@ -4,6 +4,10 @@ pub type Result<T> = std::result::Result<T, Error>;
 
 #[derive(Debug, From, Display)]
 pub enum Error {
+    /// Attempted to replace a value in a hash collection,
+    /// but there was no prime present when one was expected.
+    AbsentPrimeHashingError,
+
     #[from]
     Io(std::io::Error),
 
@@ -12,6 +16,8 @@ pub enum Error {
 
     MissingFileName,
 
+    MismatchedPackage,
+
     #[from]
     TomlDeserialize(toml::de::Error),