feat: harden install.bat + add CI checks for launcher scripts

install.bat:
- Add conda self-test (conda --version) before env create
- Verify botty python.exe exists after env creation
- Smoke-test key imports (cv2, tesserocr, discord, etc.)

CI (.github/workflows/ci.yml):
- Add test_setup_bat_files.py to test matrix

test/test_setup_bat_files.py (7 tests):
- All expected .bat files exist
- No hardcoded usernames (alex, alexpolo, ultimate) in run scripts
- No absolute home paths in run scripts (must use %~dp0 / %USERNAME%)
- All run_*.bat source find_python.bat (no duplicated conda detection)
- find_python.bat checks >= 6 conda locations
- install.bat has conda self-test and python verification

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
         run: |
           C:\Miniconda\condabin\conda.bat activate botty
           python -c "import sys; print(sys.version)"
-          coverage run -m pytest test/smoke_test.py test/nip/ test/game_stats_test.py test/closest_non_hud_test.py test/transmute/ -v -s
+          coverage run -m pytest test/smoke_test.py test/nip/ test/game_stats_test.py test/closest_non_hud_test.py test/transmute/ test/test_setup_bat_files.py -v -s
 
       - name: Coverage
         shell: powershell