This commit polishes the HTTPie request snippet contribution made in
b26d8c0. It makes the following significant changes:
- Applies project’s coding conventions for formatting and the like
- Moves to a composition-based approach for sharing functionality
between the curl and HTTPie snippets by replacing AbstractCliSnippet
with CliOperationRequest.
- Introduces a single package for CLI command snippets, thereby allowing
more code to be package-private.
See gh-207