Publish to live (#297)

* Update conceptual docs for v3 GA (#287)

This change primarily addresses the content of the conceptual
documentation for v3.0.0.

It also restructures the documentation and TOC in preparation for
upcoming PRs to sync and expand the reference documentation.

* (MAINT) Update TOC casing (#296)

---------

Co-authored-by: Mikey Lombardi (He/Him) <[email protected]>

Author: sdwheeler

dsc/docs-conceptual/dsc-3.0/toc.yml

@@ -47,7 +47,7 @@ items:
               href: https://powershell.github.io/DSC-Samples/tutorials/first-resource/go/
   - name: DSC reference
     items:
-      - name: dsc CLI
+      - name: DSC CLI
         items:
           - name: dsc
             href: reference/cli/index.md