Repair release builds and packaging across Windows, Linux ARM, and iOS XCFramework

Fixes Windows release graph builds that failed with command-line length limits or malformed Rust feature cfg values by routing full rustc invocations through response files, writing response arguments verbatim, formatting feature cfg values as string literals, and using native PowerShell wrappers for build scripts. Linux ARM release jobs now find ld and other build tools. iOS XCFramework staticlibs omit panic=abort so they can link objc2. Cargo metadata for both target and host platforms is collected to keep host build scripts and proc macros correct.