feat(versioning): align doc versions with Azure Local build numbering

- Remove legacy 0.0.1 version entirely
- Rename 1.0.0 → 2411 (frozen pre-2604 snapshot)
- Current docs become version 2604 (default)
- Update docusaurus.config.js: lastVersion, version labels, navbar dropdown
- Update .release-please-manifest.json to 2604.0.1
- Add Simplified Provisioning skip callout to Phase 04 Arc Registration

The versioning now follows Azure Local's build numbering (2411, 2604, etc.)
instead of generic semver, making it clear which Azure Local release each
version of the docs corresponds to.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: kristopherjturner

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "1.0.1"
+  ".": "2604.0.1"
 }

docs/implementation/04-cluster-deployment/phase-04-arc-registration/index.mdx

@@ -51,14 +51,15 @@ const config = {
           sidebarPath: './sidebars.js',
           editUrl: 'https://github.com/AzureLocal/',
           exclude: ['**/*.drawio'],
-          lastVersion: '1.0.0',
+          lastVersion: '2411',
           versions: {
             current: {
-              label: 'Next',
-              path: 'next',
+              label: '2604',
+              path: '',
             },
-            '1.0.0': {
-              label: '1.0.0',
+            '2411': {
+              label: '2411',
+              path: '2411',
               badge: true,
             },
           },
@@ -107,7 +108,7 @@ const config = {
             type: 'docsVersionDropdown',
             position: 'left',
             dropdownActiveClassDisabled: true,
-            versions: ['1.0.0', 'current'],
+            versions: ['current', '2411'],
           },
           {
             to: '/docs/',