Configure local state and source providers.

ocvm keeps defaults small: local state under ~/.ocvm, npm as the default OpenClaw source, and release manifests available for controlled distribution.

OCVM_HOME
Redirects all ocvm state, including config, versions, shims, cache, logs, and snapshots.
OCVM_NPM_PACKAGE
Overrides the npm package name used by the npm source provider. The default is openclaw.
OCVM_SOURCE
Set to release to use a release manifest instead of npm metadata.
OCVM_RELEASE_MANIFEST_URL
Points the release source provider at a JSON manifest with version, tag, tarball, and optional checksum metadata.