feat(metadata): improve page metadata (#215)
feat(metadata): improve page metadata (#215)

- Respect users set color-scheme to set default theme
- Add meta image for nicer link previews
stryker-mutator/stryker-mutator.github.io,stryker-mutator/stryker-mutator.github.io,stryker-mutator/stryker-mutator.github.io,stryker-mutator/stryker-mutator.github.io