This change makes minor fixes and improvements to the decomposed schemas.

Changes include:

1. Fixing the data-type conditionals for configuration parameters so that
   the `min*`/`max*` keywords only apply to the correct data types.
1. Adding type validation for default and allowed values based on the defined
   data type for the parameter.
1. Adding VS Code keywords to improve the DevX when authoring configurations
   and resource manifests:

   - The `markdownDescription` ensures that descriptive text can render as
     Markdown. Where possible, these descriptions also include a link to
     the relevant online documentation to help authors get more information
     as needed.
   - The `markdownEnumDescriptions` keyword enables adding per-enum-value
     documentation that shows on hover and with auto-complete.
   - The `patternErrorMessage` shows a useful error message instead of just
     informing the user that a string did not match a regular expression.
   - The `defaultSnippets` enables simpler auto-complete for values, allowing
     an author to pick from a list of snippets that work like normal VS Code
     snippets.
1. Ensuring that the processed schemas only include the VS Code keywords for
   the bundled VS Code schemas.
1. Adding schema associations so `*.dsc.resource.json` files are associated with
   the bundled VS Code schema for resource manifests and `.dsc[.config].yaml`
   files are associated with the bundled VS Code schema for configuration
   documents.

Together, these changes make the schemas more accurate and improve the authoring
DevX for DSCv3.