Add draft of Full Change Log for 0.8.0 blog post (#7)

* Add draft of Full Change Log to index.md

* fix markdown list formatting of Full Change Log in index.md

* Add strikethrough and move to bottom all benchmarks, examples and tests

* Update content/news/2022-07-29-bevy-0.8/index.md

Co-authored-by: Alice Cecile <[email protected]>

* Remove cut items, format links, preserve dep bumps

Co-authored-by: Alice Cecile <[email protected]>
Co-authored-by: Carter Anderson <[email protected]>

Author: 3 people