Compile websocket-only exports out of codex-api on wasm and stop enabling Tokio net there by default. Also cut the Tokio process dependency out of wasm builds of codex-git-utils by gating the async git-info module, move codex-utils-image's Tokio dependency to tests, and enable uuid's js RNG feature for wasm in codex-protocol. Native cargo checks passed for codex-api, codex-git-utils, and codex-protocol after the refactor.
Cleanup image semantics in code mode.
`view_image` now returns `{image_url:string, details?: string}`
`image()` now allows both string parameter and `{image_url:string,
details?: string}`
Adds an environment crate and environment + file system abstraction.
Environment is a combination of attributes and services specific to
environment the agent is connected to:
File system, process management, OS, default shell.
The goal is to move most of agent logic that assumes environment to work
through the environment abstraction.
Jeremy Lewi