go-get: add page (#6491)

pages/common/go-get.md

@@ -0,0 +1,16 @@
+# go get
+
+> Add a dependency package, or download packages in legacy GOPATH mode.
+> More information: <https://pkg.go.dev/cmd/go#hdr-Add_dependencies_to_current_module_and_install_them>.
+
+- Add a specified package to `go.mod` in module-mode or install the package in GOPATH-mode:
+
+`go get {{example.com/pkg}}`
+
+- Modify the package with a given version in module-aware mode:
+
+`go get {{example.com/pkg}}@{{v1.2.3}}`
+
+- Remove a specified package:
+
+`go get {{example.com/pkg}}@{{none}}`