feat: prepare mi-fitness-mcp for first public release

Package the standalone Mi Fitness MCP with clearer public docs, release metadata, CI, and safer local repository hygiene so it is ready to publish without secrets or work identity leakage.

tests/test_config.py

@@ -0,0 +1,14 @@
+from mi_fitness_mcp.config import Config, load_config, save_config
+
+
+def test_config_roundtrip(tmp_path, monkeypatch):
+    config_file = tmp_path / "config.json"
+    monkeypatch.setattr("mi_fitness_mcp.config.get_config_path", lambda: config_file)
+
+    config = Config(mode="mi_fitness_cloud", region="ru")
+    save_config(config)
+    loaded = load_config()
+
+    assert loaded.mode == "mi_fitness_cloud"
+    assert loaded.region == "ru"
+    assert loaded.database_path.name == "mi_fitness.db"