Default watchers must be renamed to use “default” naming

There are many default watchers (added to game by default on init; commander and tiny leaders also have default watchers).

In most use cases it’s a hidden watchers (used inside ability/effect/hint) and dev don’t know is it required or not without ability code view.

It can be useful to rename all that watchers to “xxxDefaultWatcher”.

No files or tests are named. Start by searching the Java source for default watcher declarations and their references, then identify every watcher that should use the “xxxDefaultWatcher” naming. Done means the relevant default watchers and their references are renamed consistently without breaking the project.

Written by the indexing model from the issue text.