Add wasmeld dev with source and local WIT replace watching, Debug builds by default, deterministic hash-based development revisions, and optional one-shot or Release operation.
Build and validate before registering, switch the isolated development Deployment only after successful startup, and unregister the prior matching development revision after the switch.
Keep generated WIT dependencies and build output outside the watch fingerprint, retain the previous deployment after failures, and avoid introducing a platform-specific watcher dependency.
Maofeng
839874fb56