Add Roadmap section to the Readme

README.md

@@ -5,6 +5,7 @@ Contents
 - [Features](#features)
 - [Building](#building)
 - [Contributing](#contributing)
+- [Raodmap](#roadmap)
 
 ## Features
 For a more full specification of the format, please see [Format.md](Format.md)
@@ -31,3 +32,9 @@ fix any issues before sending pull requests on Codeberg or patches via `git send
 
 In addition to contributing to the Rust implementation here, it would be welcome
 to see Haggis implemented in other languages.
+
+## Roadmap
+- [x] Create and extract archives
+- [x] List archive nodes
+- [ ] Specify user/group permissions to extract as
+- [ ] Automatically detect zstd compressed archives