Library Effects

Flix provides several built-in library effects for common I/O operations. These effects all have default handlers, so no explicit runWithIO is needed in main.

Effect	Description
`Assert`	Runtime assertions (`assertTrue`, `assertEq`, etc.) with configurable handlers.
`Logger`	Structured logging at five severity levels with filtering and collection.
`Math.Random`	Generating pseudorandom numbers, with optional seeded determinism.
`Net.Http` / `Net.Https`	Sending HTTP requests with a fluent API, middleware (retries, rate limiting, circuit breakers).
`Sys.Console`	Terminal I/O: reading input, printing to stdout/stderr, prompts, and menus.
`Sys.Env`	Accessing environment variables, system properties, and platform information.
`Sys.Exit`	Terminating the program with a specific exit code.
`Sys.Process`	Spawning and managing OS processes.
`Time.Clock`	Querying the current wall-clock time in various units.
`Time.Sleep`	Pausing the current thread with composable middleware (jitter, caps, logging).