Update cheatsheets

cargo-add

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cargo add
+
+> Add dependencies to a Rust project's `Cargo.toml` manifest.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-add.html>.
+
+- Add the latest version of a dependency to the current project:
+
+`cargo add {{dependency}}`
+
+- Add a specific version of a dependency:
+
+`cargo add {{dependency}}@{{version}}`
+
+- Add a dependency and enable one or more specific features:
+
+`cargo add {{dependency}} --features {{feature_1}},{{feature_2}}`
+
+- Add an optional dependency, which then gets exposed as a feature of the crate:
+
+`cargo add {{dependency}} --optional`
+
+- Add a local crate as a dependency:
+
+`cargo add --path {{path/to/crate_directory}}`
+
+- Add a development or build dependency:
+
+`cargo add {{dependency}} --{{dev|build}}`
+
+- Add a dependency with all default features disabled:
+
+`cargo add {{dependency}} --no-default-features`