Add sales division to installers, linter, and README

- Add sales/ to claude-code and copilot installer dir lists
- Add sales/ to lint-agents workflow trigger and changed-files filter
- Add LinkedIn Content Creator to marketing table in README
- Update agent count to 120

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/lint-agents.yml

@@ -8,6 +8,7 @@ on:
       - 'game-development/**'
       - 'marketing/**'
       - 'paid-media/**'
+      - 'sales/**'
       - 'product/**'
       - 'project-management/**'
       - 'testing/**'
@@ -28,7 +29,7 @@ jobs:
         id: changed
         run: |
           FILES=$(git diff --name-only --diff-filter=ACMR origin/${{ github.base_ref }}...HEAD -- \
-            'design/**/*.md' 'engineering/**/*.md' 'game-development/**/*.md' 'marketing/**/*.md' 'paid-media/**/*.md' 'product/**/*.md' \
+            'design/**/*.md' 'engineering/**/*.md' 'game-development/**/*.md' 'marketing/**/*.md' 'paid-media/**/*.md' 'sales/**/*.md' 'product/**/*.md' \
             'project-management/**/*.md' 'testing/**/*.md' 'support/**/*.md' \
             'spatial-computing/**/*.md' 'specialized/**/*.md')
           {