v0.12: Compile-Time Type Hash/Versioning

What's Changed

• cista_members for cista::pair by @felixguendling in #162
• fix array type_hash by @felixguendling in #163
• flat matrix improvements by @felixguendling in #169
• fix ci by switching to clang-15 by @felixguendling in #170
• add static type hashing by @felixguendling in #172

Thank you @AdelKS for the first working version of static type hashing!

Full Changelog: v0.11...v0.12