108 readme join up with dfercreate project and update to be md files

[Lsnaathorst1]

Overview of changes

Updating the README section to make more accurate and join up with DfE R. This will need a further update once the README template in DfE R is linkable.

Why are these changes being made?

Adding more information to each bullet point so people understand what should/could be included in a README. Referencing the create_project function in DfE R, so that people are aware they can create a new project including a README from there.

Detailed description of changes

Some changes to headings to make more publication specific. Information below each heading to describe what it should include. Addition of link to markdown guidance and link to DfE R. Changing .txt file to .md and describing why markdown files are good for READMES.

Issue ticket number/s and link

README - join up with dfeR::create_project() and update to be .md files #108
#108

This addresses the first two points on the issue above. I have made changes on DfE R to change to a template md file that can be linked here. Once this analysts guide guidance has been agreed and approved, I will need to amend the DfE R template to reflect this, and then link to the DfE R template directly here.

Checklist before requesting a review

• I have checked the contributing guidelines
• I have checked for and linked any relevant issues that this may resolve
• I have checked that these changes build locally
• I understand that if merged into main, these changes will be publicly available

[jen-machin]

Overally looks really great! It's nice and clear and should be easy for people to use in their own work 😄