Create a documentation site for tallyho documentation using docusaurus

[JohnMwashuma]

Task check list

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• [ ] Create a domain name for the tallyho documentation site. Use terraform for this. The domain name can be https://tallyho-docs.onalabs.org/.
• [ ] Create a docusaurus GitHub action to deploy the tallyho documentation to github pages.
  • Tallyho documentation can be found here

Reference material

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• Docusaurus documentation site
• Sample fhicore docusaurus issue implemented using docusaurus.
  • Issue pr: https://github.com/opensrp/fhircore/pull/1859
  • Documentation site
  • Docs folder: https://github.com/opensrp/fhircore/tree/main/docs