Function build_manifest 

pub fn build_manifest(
    id: &str,
    name: &str,
    kind: &str,
    description: &str,
    capabilities_csv: &str,
    wasm_filename: &str,
) -> QappManifest

Build a [QappManifest] from discrete author-supplied fields. The wasm bundle is referenced by filename only (its hash/size are filled by the build stage, P3); an empty wasm_filename defaults to app.wasm.