* Update dokka to v2
* Add project ktor-dokka to generate API reference
* Add links to sources
* Change footer message and title
* Use Ktor logo

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Osip Fatkullin <osip.fatkullin@jetbrains.com>