std.Progress: fixes

* bump default statically allocated resources
* debug help when multiple instances of std.Progress are initialized
* only handle sigwinch on supported operating systems
* handle when reading from the pipe returns 0 bytes
* avoid printing more lines than rows
70e39c1a20Andrew Kelley committed on 5/28/2024, 3:56:48 AMparent2233d95
1 file changedLine totals unavailable