refactor: remove bootstrap wrappers and split into config/service/installers

- Replace bootstrap wrapper with config-driven service orchestration
- Introduce Config dataclass for centralized env/CLI validation
- Add MatomoApi service for session login + app token creation
- Move Playwright installer into installers/web and drop old install package
- Refactor HttpClient to unify HTTP handling and debug to stderr
- Make E2E tests use sys.executable instead of hardcoded python3

src/matomo_bootstrap/__main__.py

@@ -1,16 +1,25 @@
-from .cli import parse_args
-from .bootstrap import run_bootstrap
-from .errors import BootstrapError
+from __future__ import annotations
+
 import sys
 
+from .cli import parse_args
+from .config import config_from_env_and_args
+from .errors import BootstrapError
+from .service import run
+
 
 def main() -> int:
     args = parse_args()
 
     try:
-        token = run_bootstrap(args)
+        config = config_from_env_and_args(args)
+        token = run(config)
         print(token)
         return 0
+    except ValueError as exc:
+        # config validation errors
+        print(f"[ERROR] {exc}", file=sys.stderr)
+        return 2
     except BootstrapError as exc:
         print(f"[ERROR] {exc}", file=sys.stderr)
         return 2