Fix unrecognized relative links in the docs and GitHub Actions workflow to validate building the documentation (Lombiq Technologies: OCORE-155)

[Piedone]

When you run mkdocs serve to run the documentation site locally, previously you got the below warnings. I fixed the links, and removed outdated ones where applicable.

I also added a GitHub Actions workflow to validate building the documentation to prevent further such issues.

INFO    -  Doc file 'docs/guides/create-modular-application-mvc/README.md' contains an unrecognized relative link
           '../../getting-started/templates/', it was left as is. Did you mean
           '../../getting-started/templates/README.md'?
INFO    -  Doc file 'docs/reference/modules/Media/README.md' contains an unrecognized relative link
           '../../../getting-started/preview-package-source', it was left as is. Did you mean
           '../../../getting-started/preview-package-source.md'?
INFO    -  Doc file 'docs/reference/modules/Media/README.md' contains an unrecognized relative link
           '../../../getting-started/preview-package-source', it was left as is. Did you mean
           '../../../getting-started/preview-package-source.md'?
INFO    -  Doc file 'docs/reference/modules/Media/README.md' contains an unrecognized relative link
           '../../../getting-started/preview-package-source', it was left as is. Did you mean
           '../../../getting-started/preview-package-source.md'?
INFO    -  Doc file 'docs/reference/modules/Scripting/README.md' contains an unrecognized relative link
           '../Setup/#recipe-parameters', it was left as is. Did you mean '../Setup/README.md#recipe-parameters'?
INFO    -  Doc file 'docs/reference/modules/Seo/README.md' contains an unrecognized relative link '../Sitemaps', it was
           left as is. Did you mean '../Sitemaps/README.md'?
INFO    -  Doc file 'docs/reference/modules/Seo/README.md' contains an unrecognized relative link
           '../Tenants/#static-file-provider-feature', it was left as is. Did you mean
           '../Tenants/README.md#static-file-provider-feature'?
INFO    -  Doc file 'docs/reference/modules/Shortcodes/README.md' contains an unrecognized relative link '../Liquid/',
           it was left as is. Did you mean '../Liquid/README.md'?
INFO    -  Doc file 'docs/reference/modules/Shortcodes/README.md' contains an unrecognized relative link
           '../../../getting-started/preview-package-source', it was left as is. Did you mean
           '../../../getting-started/preview-package-source.md'?
INFO    -  Doc file 'docs/reference/modules/Templates/README.md' contains an unrecognized relative link
           '../../core/Placement/', it was left as is. Did you mean '../../core/Placement/README.md'?
INFO    -  Doc file 'docs/reference/modules/Workflows/README.md' contains an unrecognized relative link
           '../Queries/#scripting', it was left as is. Did you mean '../Queries/README.md#scripting'?
INFO    -  Doc file 'docs/releases/1.7.0.md' contains an unrecognized relative link '../modules/Sitemaps', it was left
           as is.
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'tutorials', it was left as is.
           Did you mean 'tutorials/README.md'?
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'development-tools', it was left
           as is. Did you mean 'development-tools/README.md'?
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'meeting', it was left as is. Did
           you mean 'meeting/README.md'?
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'branding', it was left as is. Did
           you mean 'branding/README.md'?
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'libraries', it was left as is.
           Did you mean 'libraries/README.md'?
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'owners', it was left as is. Did
           you mean 'owners/README.md'?
INFO    -  Doc file 'docs/resources/README.md' contains an unrecognized relative link 'workshops', it was left as is.
           Did you mean 'workshops/README.md'?
INFO    -  Doc file 'docs/topics/configuration/README.md' contains an unrecognized relative link '../glossary/#Recipe',
           it was left as is.
INFO    -  Doc file 'docs/topics/configuration/README.md' contains an unrecognized relative link '../glossary/#Tenant',
           it was left as is.

[Piedone]

@agriffard can you please review?

[MikeAlhayek]

I like this to ensure our docs do not have invalid links

[Piedone]

Thank you!