fix(release): Replace broken cargo-dist with simple cargo build + cargo-wix

- Remove cargo-dist entirely (failed silently, never produced artifacts)

- Rewrite release.yml: plain cargo build --release per target, cargo-wix for MSI

- Fix wix/main.wxs: invalid GUID (F7G8), broken CustomAction, missing KeyPath

- Clean Cargo.toml: remove dead [workspace.metadata.dist], fix path-guid

- Move install scripts to scripts/ as standalone testable files

Made-with: Cursor

Author: OlaProeis