chore!: Rename PositionComponent to PositionedComponent

[alpozcan]

Description

Positioned is the correct usage of the word. Rename PositionComponent to PositionedComponent.
Given the nature of this change, I'm not really expecting this to be merged, but in case it can be considered for v2 perhaps, here it is.

Checklist

• I have followed the Contributor Guide when preparing my PR.
• 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 or docs.

Breaking Change?

• Yes, this PR is a breaking change.
• No, this PR is not a breaking change.

Migration instructions

Rename all occurrences of PositionComponent to PositionedComponent.

Related Issues

[alpozcan]

nevermind, tests are failing and I don't want to sink more time into this.

[pcornelissen]

You could add a transitional PositionComponent that inherits from PositionedComponent

[spydon]

In v2 it will most likely be called TransformComponent.

PositionComponent isn't wrong grammatically either though, it refers to that it has a position, not that it is positioned. But it has a lot more transform properties than position, which is why it'll most likely change name in v2.