cargo-doc: add page (#3697)

Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>

pages/common/cargo-doc.md

@@ -0,0 +1,20 @@
+# cargo doc
+
+> Build and view Rust package documentation offline.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-doc.html>.
+
+- Build and view the default package documentation in the browser:
+
+`cargo doc --open`
+
+- Build documentation without accessing the network:
+
+`cargo doc --offline`
+
+- View a particular package's documentation:
+
+`cargo doc --open --package {{package}}`
+
+- View a particular package's documentation offline:
+
+`cargo doc --open --offline --package {{package}}`