Fix arginfo/zpp mismatch

Remove missed stack argument info

Rename Fiber::status() to getStatus()

Remove now fiber->value unnecessary assignments

Add Fiber::getReturn()

Remove stack size param

Can add back if need arises.

Add more demos

Improve stub

Fix throw() type check and throwing exception

Add license

Update demos and move stub

Throw Error when throwing into unsuspended fiber

Fix arg count for 8

Update readme

Update to build on PHP 8

Rename to ext-fiber

Renamed Fiber::yield() to Fiber::suspend()

Get things compiling

Imported native fibers into new task extension.

Initial commit