Get rid of the rest of the toSeconds (zio#6975)

Merge master to series 2.x (zio#6953)

* Add Prezi to adopters list (zio#6864)

* Fix ZIO 1.x sidebars (zio#6863)

* remove extra sidebar
rename how-to to guides

* rename howto to guides.

* issue zio#5878 - Backport ThreadLocalBridge (zio#5980)

* Rewritten based on the merged version of PR zio#5907

* call Supervisor.unsafeOnResume() even if `superviseOperations` is false (same as ZIO 2)

* chore(deps): update zio.version to v1.0.15 (zio#6899)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

* add 7 and 8 arg for check, checkM, checkAll and checkAllM (zio#6916)

* Fix frontmatters (zio#6949)

* remove extra usecases sidebar.

Co-authored-by: Mate Borcsok <mate.borcsok@prezi.com>
Co-authored-by: Dmitry Karlinsky <dmitryka@wix.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: LUC DUZAN <strokyl@users.noreply.github.com>
Co-authored-by: Daniel Vigovszky <daniel.vigovszky@gmail.com>

issue zio#5878 - Backport ThreadLocalBridge (zio#5980)

* Rewritten based on the merged version of PR zio#5907

* call Supervisor.unsafeOnResume() even if `superviseOperations` is false (same as ZIO 2)

Investigate Scala JS Issue (zio#6760)

* investigate scala js issue

* reduce size

* reduce size

Optimize ZStream#groupByKey (zio#6630)

* optimize

* fix compilation errors

handle fiber failures (zio#6600)

propagate tracing information (zio#6584)

Pardon the spec interruption (zio#6521)

* Improved Assertions for TestOutput. Print ExecutionEvent when parent failure is encountered. Report failed tests in ScalaJS runner.

* rm forced ChunkSpec failure

* Debugging interruption

* Make Specs interruptable

* Delete fruitless test

* Make tests Await forever

Reloadable buffer pools (zio#6447)

* Reloadable buffer pools

* scheduleBackround

* Fix

* Fiber => Fiber.Runtime

Add label support for assertTrue (zio#5743) (zio#6275)