cargo-{clean,fmt}: add page (#10770)

* cargo clean: add page

* cargo fmt: add page

pages/common/cargo-clean.md

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+# cargo clean
+
+> Remove generated artifacts in the `target` directory.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-clean.html>.
+
+- Remove the entire `target` directory:
+
+`cargo clean`
+
+- Remove documentation artifacts (the `target/doc` directory):
+
+`cargo clean --doc`
+
+- Remove release artifacts (the `target/release` directory):
+
+`cargo clean --release`
+
+- Remove artifacts in the directory of the given profile (in this case, `target/debug`):
+
+`cargo clean --profile {{dev}}`

pages/common/cargo-fmt.md

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+# cargo fmt
+
+> Run `rustfmt` on all source files in a Rust project.
+> More information: <https://github.com/rust-lang/rustfmt>.
+
+- Format all source files:
+
+`cargo fmt`
+
+- Check for formatting errors without writing to the files:
+
+`cargo fmt --check`
+
+- Pass arguments to each `rustfmt` call:
+
+`cargo fmt -- {{rustfmt_args}}`