feat(api): Add api wrappers for creating snippets

This adds two simple API wrappers for creating snippets for the user and
inside the project. This should help us start work with creating a
snippets command.

Issue #872

api/snippets.go

@@ -0,0 +1,37 @@
+package api
+
+import "github.com/xanzy/go-gitlab"
+
+// CreateSnippet for the user inside the users snippets
+var CreateSnippet = func(
+	client *gitlab.Client,
+	projectID interface{},
+	opts *gitlab.CreateSnippetOptions,
+) (*gitlab.Snippet, error) {
+	if client == nil {
+		client = apiClient.Lab()
+	}
+
+	snipet, _, err := client.Snippets.CreateSnippet(opts)
+	if err != nil {
+		return nil, err
+	}
+	return snipet, err
+}
+
+// CreateProjectSnippet inside the project
+var CreateProjectSnippet = func(
+	client *gitlab.Client,
+	projectID interface{},
+	opts *gitlab.CreateProjectSnippetOptions,
+) (*gitlab.Snippet, error) {
+	if client == nil {
+		client = apiClient.Lab()
+	}
+
+	snipet, _, err := client.ProjectSnippets.CreateSnippet(projectID, opts)
+	if err != nil {
+		return nil, err
+	}
+	return snipet, err
+}