refactor: extract MdrsClient service layer for library portability

To improve the tool's portability as a Python library, the core logic
has been decoupled from the CLI interface. This allows developers to
programmatically interact with MDRS without relying on CLI-specific
argument parsing or local file-based caches.

- Introduce `MdrsClient` service layer to handle core operations.
- Abstract authentication state using `CacheInterface` and `InMemoryCache`.
- Migrate all CLI commands to utilize `MdrsClient` for execution.
- Separate `Doi` data model from API responses and move to `models/doi.py`.
- Update `README.md` to include Python API usage examples.
- Bump package version to 1.3.17.

mdrsclient/commands/labs.py

@@ -19,11 +19,11 @@ class LabsCommand(BaseCommand):
 
     @classmethod
     def labs(cls, remote: str) -> None:
-        remote = cls._parse_remote_host(remote)
-        connection = cls._create_connection(remote)
-        laboratory_api = LaboratoriesApi(connection)
-        laboratories = laboratory_api.list()
-        connection.laboratories = laboratories
+        remote_host = cls._parse_remote_host(remote)
+        from mdrsclient.client import MdrsClient
+
+        client = MdrsClient.from_remote(remote_host)
+        laboratories = client.get_laboratories()
         label = {"id": "ID", "name": "Name", "pi_name": "PI", "full_name": "Laboratory"}
         length: dict[str, int] = {}
         for key in label.keys():
@@ -34,7 +34,6 @@ class LabsCommand(BaseCommand):
             length["pi_name"] = max(length["pi_name"], len(laboratory.pi_name))
             length["full_name"] = max(length["full_name"], len(laboratory.full_name))
         header = (
-            # f"{label['id']:{length['id']}}\t{label['name']:{length['name']}}\t"
             f"{label['name']:{length['name']}}\t"
             f"{label['pi_name']:{length['pi_name']}}\t{label['full_name']:{length['full_name']}}"
         )
@@ -42,7 +41,6 @@ class LabsCommand(BaseCommand):
         print("-" * len(header.expandtabs()))
         for laboratory in laboratories:
             print(
-                # f"{laboratory.id:{length['id']}}\t{laboratory.name:{length['name']}}\t"
                 f"{laboratory.name:{length['name']}}\t"
                 f"{laboratory.pi_name:{length['pi_name']}}\t{laboratory.full_name:{length['full_name']}}"
             )