Implement distribution management API and UI forms; add distribution model and tests

main.py

@@ -1,3 +1,5 @@
+from routes.distributions import router as distributions_router
+from routes.ui import router as ui_router
 from routes.parameters import router as parameters_router
 from fastapi import FastAPI
 from fastapi.middleware import Middleware
@@ -15,3 +17,5 @@ app.middleware("http")(validate_json)
 # Include API routers
 app.include_router(scenarios_router)
 app.include_router(parameters_router)
+app.include_router(distributions_router)
+app.include_router(ui_router)