cargo-*: add page; cargo-logout: update page (#11337)

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>

pages/common/cargo-package.md

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+# cargo package
+
+> Assemble a local package into a distributable tarball (a `.crate` file).
+> Similar to `cargo publish --dry-run`, but has more options.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-package.html>.
+
+- Perform checks and create a `.crate` file (equivalent of `cargo publish --dry-run`):
+
+`cargo package`
+
+- Display what files would be included in the tarball without actually creating it:
+
+`cargo package --list`