Cargo.toml: add metadata for packaging

Cargo.toml

@@ -5,6 +5,13 @@ name = "rbpf"
 version = "0.0.1"
 authors = ["Quentin Monnet <quentin.monnet@6wind.com>"]
 
+# Additional metadata for packaging
+description = "Virtual machine and JIT compiler for eBPF programs"
+repository = "https://github.com/qmonnet/rbpf"
+readme = "README.md"
+keywords = ["BPF", "eBPF", "interpreter", "JIT", "filtering"]
+license = "Apache-2.0/MIT"
+
 # Packaging directives
 exclude = ["misc/*"]