Use HTTPS repository metadata

[9904099]

Summary

Update the npm repository metadata from the SSH GitHub URL to the public HTTPS Git URL.

The package is public, so the published metadata should not require SSH configuration for npm users or metadata tooling.

Validation

node -e "const p=require('./package.json'); const expected='git+https://github.com/foisonocean/vite-plugin-graphql.git'; if (p.repository.url !== expected) process.exit(1)"
npm pack --dry-run --ignore-scripts --json .
git diff --check

npm pack completed successfully. It only emitted the existing .npmignore fallback warning.