Add link to each page to submit a documentation issue

[stumbo]

This change takes advantage of existing Docsy infrastructure. I have enabled the feedback dialog which is put at the bottom of each page:

If either the yes or no button is pushed the user is given an opportunity to provide additional feedback:

The above represents when the user selects No. The link takes the user to our standard Documentation Issue Submission Form on GitHub:

---

We can start with this approach. One advantage, the documentation states that when the Yes or No button is pushed an event is sent to Google Analytics. This may start giving us some additional feedback on pages regardless of whether the user takes the next step to create an issue:

# Adds a H2 section titled "Feedback" to the bottom of each doc. The responses are sent to Google Analytics as events.
# This feature depends on [services.googleAnalytics] and will be disabled if "services.googleAnalytics.id" is not set.
# If you want this feature, but occasionally need to remove the "Feedback" section from a single page, ...

[pamoroso]

It looks good to me and this Docsy feature seems a great tool.

[masinter]

Do you need a GitHub account to raise an issue ?

[pamoroso]

Yes, raising a GitHub issue does require an account.