Use HTTPS repository metadata

[snkk2x-collab]

Summary:

• replace SSH repository metadata with a public HTTPS GitHub URL

Validation:

• node package metadata assertion
• git diff --check
• git ls-remote https://github.com/violentmonkey/rollup-plugin-userscript.git HEAD
• pnpm install --frozen-lockfile --ignore-scripts
• pnpm run ci
• pnpm run build
• pnpm pack --dry-run

Note:

• local push used HUSKY=0 after validation because the repository pre-push hook expects npm on PATH in this shell.