Update branch references from dev to main, refresh users and GitHub data

- Switch all CI, dependabot, and docs references from dev to main
- Update users list and screenshots via processUsers
- Refresh contributors and sponsors data

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/dependabot.yml

@@ -5,7 +5,7 @@ version: 2
 updates:
   - package-ecosystem: "npm"
     directory: "/"
-    target-branch: "dev"
+    target-branch: "main"
     schedule:
       interval: "weekly"
       day: "wednesday"
@@ -15,7 +15,7 @@ updates:
       - "dependencies"
   - package-ecosystem: "github-actions"
     directory: "/"
-    target-branch: "dev"
+    target-branch: "main"
     schedule:
       interval: "weekly"
       day: "wednesday"

.github/workflows/hugo-version-update.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v6
         with:
-          ref: dev
+          ref: main
           submodules: true # Fetch Hugo themes (true OR recursive)
           fetch-depth: 0 # Fetch all history for .GitInfo and .Lastmod
 
@@ -51,4 +51,4 @@ jobs:
             [2]: https://github.com/peter-evans/create-pull-request
           labels: dependencies, automated pr
           branch: hugo-new-version
-          base: dev
+          base: main