Improve release process documentation

[felixfontein]

Create a folder docs/, and create documents in there describing all aspects of the release process.

• Document the release process for X.Y.0 freeze releases #324

[gotmax23]

#224 is a start. Feedback welcome!

[gotmax23]

Here is my idea for a documentation layout:

• docs/policies.md - breakdown of Ansible Community Steering Committee Policies that apply to this repository add release documentation scaffolding #224 is a start, but the Removal From Ansible policy still needs to be added.
• docs/adding.md - short explanation of how to add a collection to the ansible. This can borrow text from the existing README.
• docs/release-process.md - step by step breakdown of the ansible release process. I know the basics of the release process, but I may need to consult with @anweshadas for specifics if I write this. (Add initial release-process.md #227)
• docs/new-ansible.md - explanation about creating a new ansible release. This should cover creating the {MAJOR VERSION} directory, generating the ansible-{MAJOR VERSION}.build file, and creating frozen releases. This would serve as an appendix to docs/release-process.md
• docs/structure.md - breakdown of the repository structure. This can also borrow text from the existing README.

What do folks think?

[Andersson007]

SGTM

[gotmax23]

I took a stab at documenting the release process (docs/release-process.md) in #227.