Function buildBundleFromFiles

buildBundleFromFiles(
    files: Map<string, BundleFile>,
    manifestFile: BundleFile,
    source: BundleSource | undefined,
): ValidationResult<Bundle>
Build a Bundle from an in-memory file map and a manifest file entry. Shared between the directory loader and the .iflx unpacker.
Parameters
- files: Map<string, BundleFile>
- manifestFile: BundleFile
- source: BundleSource | undefined
Returns ValidationResult<Bundle>