Add tier badging

Add Free tier badges to packages docs.

doc/user/packages/container_registry/index.md

@@ -4,7 +4,7 @@ group: Package
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
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-# GitLab Container Registry
+# GitLab Container Registry **(FREE)**
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/4040) in GitLab 8.8.
 > - Docker Registry manifest `v1` support was added in GitLab 8.9 to support Docker

doc/user/packages/index.md

@@ -4,7 +4,7 @@ group: Package
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Packages & Registries
+# Packages and Registries **(FREE)**
 
 The GitLab [Package Registry](package_registry/index.md) acts as a private or public registry
 for a variety of common package managers. You can publish and share

doc/user/packages/rubygems_registry/index.md

@@ -4,7 +4,7 @@ group: Package
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Ruby gems in the Package Registry
+# Ruby gems in the Package Registry **(FREE)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/803) in [GitLab Free](https://about.gitlab.com/pricing/) 13.10.
 

doc/user/packages/workflows/project_registry.md

@@ -4,7 +4,7 @@ group: Package
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Store all of your packages in one GitLab project
+# Store all of your packages in one GitLab project **(FREE)**
 
 You can store all of your packages in one project's Package Registry. Rather than using
 a GitLab repository to store code, you can use the repository to store all your packages.