Initial PWA setup

[jasonpaulso]

205

• chore: add serviceworker-rails gem to Gemfile
• chore: add .ruby-version file with version 3.2.3
• chore: add favicon.svg, android-chrome-192x192.png, android-chrome-512x512.png, apple-touch-icon.png, and manifest.json files
• chore: update application_helper.rb with meta_tag, charset_tag, and viewport_tag methods
• chore: update application/_head.html.erb with charset_tag and viewport_tag
• chore: update application/head/_meta_tags.html.erb with meta tags
• chore: update application/head/_favicons.html.erb with favicon links
• chore: update layouts/application.html.erb with title tag
• chore: update layouts/settings.html.erb with title tag