Add Plausible analytics

[mrdarrengriffin]

As per the announcement from the Open Home Foundation, we are rolling out Plausible to all projects within the Open Home Foundation - https://www.openhomefoundation.org/blog/making-our-web-analytics-open-source-with-plausible/

This PR adds Plausible, some footer text and 404 page tracking

Dashboard will be visible here: https://plausible.openhomefoundation.org/hacs.xyz

[Copilot]

Pull request overview

This PR integrates Plausible analytics into the documentation site and adds user-facing attribution text, including a custom event for 404 page views.

Changes:

• Injects the Plausible tracking snippet via a template override (main.html).
• Adds an attribution paragraph in the footer “Resources” section plus styling for it.
• Adds Plausible custom event tracking on the 404 page.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
source/overrides/partials/footer.html	Adds a footer partial override (currently empty), which can affect global footer rendering.
source/overrides/partials/content.html	Adds Plausible attribution text with external links in the footer section.
source/overrides/main.html	Injects Plausible analytics script into the page head via extrahead.
source/overrides/404.html	Tracks 404 page views via a Plausible custom event call.
source/assets/stylesheets/extra.css	Styles the Plausible attribution paragraph and its links.

Suppressed comments (1)

source/overrides/partials/footer.html:2

• The new overrides/partials/footer.html override is empty, which will replace the theme’s footer partial with no output. In MkDocs Material this typically removes the entire <footer> (including navigation/copyright) across the site. If the intent is only to add attribution text, consider removing this override; otherwise, populate it by copying the upstream theme footer partial and applying the minimal customization needed.

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