deprecate configbuilder & move dependencies to opt extras #586

All 336 tests pass, 1 skipped in 18s

337 tests ±0 336 ✔️ ±0 18s ⏱️ ±0s
    1 suites ±0     1 💤 ±0
    1 files ±0     0 ❌ ±0

Results for commit 47549e7. ± Comparison against earlier commit 5a5fff9.