build: add package metadata

[ubugeeei]

Summary

• add npm repository/homepage/bugs/keywords metadata
• add crate descriptions and path+version workspace dependencies
• update repository metadata to the current GitHub location

Closes #7

Validation

• vp check package.json npm/fastqr/package.json npm/fastqr_vue/package.json Cargo.toml crates/fastqr_core/Cargo.toml crates/fastqr_image/Cargo.toml crates/fastqr_tui/Cargo.toml crates/fastqr_wasm/Cargo.toml crates/fastqr_napi/Cargo.toml
• cargo metadata --no-deps --format-version 1
• cargo package --list --allow-dirty for all workspace crates

[ubugeeei]

Landed via #27 after local vp run ci and final GitHub Actions CI passed. Closing this issue-scoped PR to keep the queue and PR list clean.