Make To-do action names and descriptions consistent with HA standard

[NoRi2909]

Proposed change

Currently all actions of the To-do integration repeat "to-do list" in their friendly names which adds a lot of noise in the UI making them really hard to read them at a quick glance:

(That single screenshot above contains 16 occurrences of "to-do list")

This PR reduces them back to shorter names that are identical to the internal names.

In the UI this will result in:

• To-do list: Add item
• To-do list: Get items
• To-do list: Update item
• To-do list: Remove item
• To.do list: Remove completed items

In addition it changes all descriptions to use the common way of describing their purpose with what each one does: "Adds …", "Gets …", "Updates …", and "Removes …"

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• 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:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

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

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  Updated and included derived files by running: python3 -m script.hassfest.
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[home-assistant]

Hey there @home-assistant/core, mind taking a look at this pull request as it has been labeled with an integration (todo) you are listed as a code owner for? Thanks!

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[NoRi2909]

Just for the record: The PR also makes this more consistent with how the Shopping list actions already look today – regarding both the names and the descriptions: