Add support for todo component

[bramkragten]

Proposed change

For: home-assistant/core#100019

Needs: #18286

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[piitaya]

Suggested change

	export enum TodoItemStatus {
	NeedsAction = "needs-action",
	Completed = "completed",
	}
	export type TodoItemStatus = "needs-action" | "completed"

Should we use literal instead of enum as we do this for other domain (e.g. climate hvac_modes)?

[bramkragten]

Personally I rather use the enum, but it should have been a const enum here