GitHub Actions: npm ci and npm run build

[Saibamen]

Run npm ci and npm run build commands on every push

Running workflow: https://github.com/Saibamen/svelte-table/actions/runs/2735321347

[dasDaniel]

Until some test are added, the github action is not going to offer much beyond a smoke test.
Should probably include an audit as-well

[Saibamen]

IMO even small GH actions can bring some benefits.
For example here, we can check if code from PRs can be build and all NPM dependencies can be installed - without downloading code from PR and compiling on local computer