Make some image/mounting related functions public (#335)

Make some image/mounting related functions public for use outside of
this repo

Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>

Sources/Containerization/AttachedFilesystem.swift

@@ -45,4 +45,11 @@ public struct AttachedFilesystem: Sendable {
         self.destination = mount.destination
     }
     #endif
+
+    public init(type: String, source: String, destination: String, options: [String]) {
+        self.type = type
+        self.source = source
+        self.destination = destination
+        self.options = options
+    }
 }

Sources/Containerization/Hash.swift

@@ -19,7 +19,7 @@
 import Crypto
 import ContainerizationError
 
-func hashMountSource(source: String) throws -> String {
+public func hashMountSource(source: String) throws -> String {
     guard let data = source.data(using: .utf8) else {
         throw ContainerizationError(.invalidArgument, message: "\(source) could not be converted to Data")
     }

Sources/Containerization/Image/ImageStore/ImageStore.swift

@@ -103,7 +103,7 @@ extension ImageStore {
     /// - Note: It is assumed that the underlying manifests and blob layers for the image already exists in the `ContentStore` that the `ImageStore` was initialized with. This method is invoked when the `pull(...)` , `load(...)` and `tag(...)` methods are used.
     /// - Returns: A `Containerization.Image`
     @discardableResult
-    internal func create(description: Image.Description) async throws -> Image {
+    public func create(description: Image.Description) async throws -> Image {
         try await self.lock.withLock { ctx in
             try await self._create(description: description, lock: ctx)
         }