Add unique icons for all major development tools

Describe the request The taskbar is much more useful if it's easy to tell what kind of window each slot represents at a glance, but not all tools have a specific icon for it to use. Notable examples:

Debugger (the old Glamorous Toolkit debugger had one, a bug, which would work fine)
Iceberg tools—could all share a single one to start, though it would be cool if certain ones at least had specific icons—distinguishing commit windows from repo-list/working-copy/history windows would be a high priority for me
Playground has one some places but not others, specifically not the taskbar. The one it does use some places isn't that different from the generic Morph icon either, but I guess it's good enough especially if other tools are more unique.
Inspector—maybe a magnifying glass?

This is a follow-up to #15825—serving the same goal but seems like a distinct unit of work.

Expected development cost I'm less confident in coming up with the icons themselves here, but otherwise the scope of work is similar to #15825.

Version information: Any OS, any Pharo

pharo-project / pharo

Add unique icons for all major development tools #15826