Correctly pair 'remove' with 'add' in description of To-do list card

[NoRi2909]

When using 'Add' in Home Assistant this should always pair with 'Remove', like 'Create' does with 'Delete'.

The To-do list card introduces an inconsistent third word by using 'clear' instead, right next to 'add'.
This isn't used anywhere else in HA like in To-do list actions or the UI where it's always 'remove', even in the To-do list card itself:

This fixes this and also properly capitalizes "To-do list" as it's a name like in all other Dashboard card types.

Proposed change

Replace "to-do list' with 'To-do list' as it's a name.

Replace 'clear' with 'remove' for consistent wording.

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

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