Fix/logo download permission error (#70)

* fix: Resolve permission errors when downloading sports logos

- Fix fix_assets_permissions.sh to use correct directory name 'ncaa_logos' instead of 'ncaa_fbs_logos'
- Add comprehensive permission checking in logo downloader
- Improve error handling with specific permission error messages
- Add write access testing before attempting logo downloads
- Provide clear instructions to run permission fix script when errors occur

Fixes: [Errno 13] Permission denied errors when downloading team logos like SELA.png

* fix: Update first_time_install.sh to use correct ncaa_logos directory

- Fix manual permission setting section to use 'ncaa_logos' instead of 'ncaa_fbs_logos'
- Ensures consistency across all installation scripts
- Prevents permission issues during first-time installation

* fix: Update all remaining references from ncaa_fbs_logos to ncaa_logos

- Fix README.md directory reference
- Update wiki documentation files (MANAGER_GUIDE_COMPREHENSIVE.md, TEAM_ABBREVIATIONS_AND_LEAGUE_SLUGS.md)
- Fix test files (save_missing_teams.py, test_ranking_toggle.py, test_leaderboard_simple.py)
- Update missing_team_logos.txt with correct directory paths

Ensures complete consistency across the entire project for NCAA logo directory naming.

first_time_install.sh

@@ -240,7 +240,7 @@ else
     
     # Specifically ensure the sports logos directories are writable
     SPORTS_DIRS=(
-        "sports/ncaa_fbs_logos"
+        "sports/ncaa_logos"
         "sports/nfl_logos"
         "sports/nba_logos"
         "sports/nhl_logos"