Convert README.rst to markdown
This MR resolves issues parsing the RST from the readme by converting it to markdown and simplifying.
This requires duplicating the badge links in docs/index.rst, but that's a small extra burden.
Maintenance will be performed on git.ligo.org, containers.ligo.org, and docs.ligo.org on Tuesday 24 September 2024 starting at approximately 9am PDT. It is expected to take around 30 minutes and there will be several periods of downtime throughout the maintenance. Please address any comments, concerns, or questions to the helpdesk.
This MR resolves issues parsing the RST from the readme by converting it to markdown and simplifying.
This requires duplicating the badge links in docs/index.rst, but that's a small extra burden.