feat: adds "edit this page" and "page last modified" to footer

Update nav.html for handling nav_exclude

Fix duplicated title and description tags

v0.2.8

bugfix in search.rake

Update rake requirement from ~> 12.3.1 to >= 12.3.1, < 13.1.0

Bump stylelint-config-primer from 8.0.0 to 9.0.0

Update bundler requirement from ~> 2.0.1 to ~> 2.1.4

Updates the requirements on [bundler](https://github.com/bundler/bundler) to permit the latest version.
- [Release notes](https://github.com/bundler/bundler/releases)
- [Changelog](https://github.com/bundler/bundler/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bundler/bundler/compare/v2.0.1...v2.1.4

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump @primer/css from 12.7.0 to 14.3.0

Update jekyll requirement from ~> 3.8.5 to >= 3.8.5, < 4.1.0

Create config.yml

Bumps [@primer/css](https://github.com/primer/css) from 12.7.0 to 14.3.0.
- [Release notes](https://github.com/primer/css/releases)
- [Changelog](https://github.com/primer/css/blob/master/CHANGELOG.md)
- [Commits](https://github.com/primer/css/compare/v12.7.0...v14.3.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Currently just-the-docs renders two title and description tags
when used with jekyll-seo-tag. This patch fixes plugin detection
conditonal.

It appears nav_exclude only works on top level navigation items. I needed it to work at the child level as well. I believe these changes accomplish that for the child and grand_child levels.

Love this theme. I've used it a few times. Apologies if this pull request is not according to convention. This is the first time I've done it on someone else's code. Thanks!