fix: debugMode should be inherited from parent when mounted

[spydon]

Description

debugMode wasn't propagating properly from the parent component to it's descendants.
If you for example added a component a to a component b first, and then added b to c which had debugMode = true, a would not have debugMode = true. But if a was added to b after it was added to c, then a would have debugMode = true.

This also fixes the debugMode for HitboxShapes.

Checklist

• The title of my PR starts with a Conventional Commit prefix (fix:, feat:, docs: etc).
• I have read the Contributor Guide and followed the process outlined for submitting PRs.
• I have updated/added tests for ALL new/updated/fixed functionality.
• I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• I have updated/added relevant examples in examples.

Breaking Change

• No, this is not a breaking change.

Related Issues

[wolfenrain]

LGTM

[luanpotter]

LGTM