feat: metrics widget & unified page footer

[cwaring]

This PR resolves the following issues:
ipfs-inactive/docs#306 ipfs-inactive/docs#407 ipfs-inactive/docs#406 ipfs-inactive/docs#342 ipfs-inactive/docs#341

New components:

<EditOrIssue />

<Feedback />

Associated config props:

  props: {
    titleTxt: {
      type: String,
      default: 'Was this information helpful?'
    },
    thanksTxt: {
      type: String,
      default: 'Thank you for the feedback.'
    },
    evtYes: {
      type: String,
      default: 'yes'
    },
    evtNo: {
      type: String,
      default: 'no'
    },
    yesTxt: {
      type: String,
      default: 'Yes'
    },
    noTxt: {
      type: String,
      default: 'No'
    },
    editOrIssueLinks: {
      type: Boolean,
      default: true
    }
  }

<LegacyCallout />

Default events for metrics widget:
information_helpful
information_not_helpful
topic_important
topic_not_important

New Page template to tie all the layout together.

Associated views:

Test url: https://deploy-preview-41--ipfs-docs-v2.netlify.com/

Draft PR. Changelog TBC
closes: ipfs-inactive/docs#306 ipfs-inactive/docs#407 ipfs-inactive/docs#406 ipfs-inactive/docs#342 ipfs-inactive/docs#341

Page footer to do …

• Add vertical spacing above the callout (should match spacing between major page sections)
• Split the four links into two columns on desktop
• Change the "View this page on legacy site" to regular (thinner) weight font

Widget

• Edit this page or open an issue
• Add GA custom events
• Add props for template strings and events
• Setup widget on Content Status view
• Check events are tracking

[jessicaschilling]

IT'S GLORIOUS YES I AM SHOUTING
PUT IT ON A GLORIOUS BOAT