A new alpha! v7.0.0-alpha2

@r.w.bowman is moving version 7.0.0-Alpha2 along to complete what @j.stirling was driving forward, and reach V7.0.0-Beta.

If you have any comments or suggestions from your experience of making and using the Alpha2 please let us know here or make an Issue on the GitLab repository. Many of the previous comments from the forum have been addressed, but we may have missed some. If you want to take a look at where we are now, the instructions and STLs from the latest build are at Assembly Instructions (openflexure.gitlab.io) (I think that link will only work until 2nd Nov 2022). Outstanding questions and comments that we know about are in the issues list Issues · OpenFlexure · GitLab for the whole project and Issues · OpenFlexure / openflexure-microscope · GitLab for the microscope hardware and instructions.