TASK - Update "Player" component for new addon system

[mfreidel]

NOTE: This task needs more research

The current scene and script files for the player component need to be significantly altered to tie into the new ShmupWorks addon.

Additionally, the shooting functionality should be changed to occur totally inside of the Player scene as a part of this change. Doing so should utilize ShmupSpawner in some fashion. Perhaps by adding a PlayerWeapon child scene?

Pre-flight Checklist

Verify all before starting work

• I have performed and documented some basic research and planning before opening this task.
• This task implements a new core feature, or substantially alters an existing one.
• I have confirmed that this is not a duplicate task.
• I have confirmed that this task is not already being worked on or completed.
• This issue has an assignee.
• This issue is assigned to the learn2shmup project.
• This issue is assigned to the appropriate milestone in GitHub.
• This issue has appropriate labels to identify components this may alter.
• I have read, selected, and verified the above checkmarks accurately.

Sub-tasks

Smaller individual tasks required for completion:

• Implement feature(s)
  • Any smaller components?
• Any extra steps?
• Write documentation and/or notes
• Manual testing

Planned procedure

Chronological list of planned work:

1. Step One
2. Step Two

Task research, planning and notes

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them over the contents of this section.
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