Merge rebuilders into tools page

Merge rebuilders into the tools page and adapt the layout.

• fixed some links: diffoscope and robur-coop/builder-web and several Arch Linux Package links.
• added the unreproducible package and closes #40 (closed) and #47 (closed)
• added ismypackagereproducibleyet

Closes #35 (closed)

Categorized the tools:

Tools

Tools to compare build artifacts and/or detect nondeterminism

• diffoscope
• trydiffoscope
• reprotest
• disorderfs
• The Unreproducible Package
• diffoci
• reproducible-apk-tools
• ismypackagereproducibleyet

Tools to make builds reproducible (by removing nondeterminism)

• strip-nondeterminism
• disorderfs
• Reproducible Build Maven Plugin
• sbt-reproducible-builds
• reproducible-apk-tools
• apksigcopier

Tools for rebuilding

orchestrators

• rebuilderd
• PackageRebuilder
• Reproducible Builds Transparency Log (rbtlog)

rebuilder-backends

• Arch Linux repro
• Arch Linux makerepropkg
• Debian debrebuild.pl
• debrebuild
• rpmreproduce
• orb

clients/frontends

• Rebuilderd Website
• ismyarchverifiedyet
• Arch Repro Status
• Builder-web (robur)

verifiers?

Misc