fix: add missing service README.md files with basic description

[schweigisito]

Description

Add missing README.md files, including some basic servcie description, to some of the affected services

Motivation and Context

docs build pipeline fails because of missing files, therefore missing links within the docs files.

How Has This Been Tested?

Not yet, will be tested with a next 'markdown-docs-generatoranddocs` build run

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [ ] Tests only (no source changes)

Checklist:

• [ ] Code changes
• [ ] Unit tests added
• [ ] Acceptance tests added
• [x] Documentation added