move Primer::HeadingComponent to Primer::Beta::Heading

[mxriverlynn]

split from #676

this PR moves Primer::HeadingComponent to Primer::Beta::Heading, and replaces the original with a deprecated version

files to note

most of the file changes in this PR are reference updates. these files should be the focus of review:

• app/components/primer/beta/heading.rb
• app/components/primer/heading_component.rb
• app/lib/primer/view_helper.rb
• docs/src/@primer/gatsby-theme-doctocat/nav.yml
• lib/primer/view_components/linters/helpers/deprecated_components_helpers.rb
• lib/rubocop/cop/primer/component_name_migration.rb
• lib/tasks/docs.rake
• static/statuses.json
• test/components/heading_component_test.rb → test/components/beta/heading_test.rb
• test/components/component_test.rb

screenshots

doc site:

storybook:

[changeset-bot]

🦋 Changeset detected

Latest commit: de586da

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/view-components	Patch

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