Handle url error better when invalid blueprint url is provided

[silamon]

Breaking change

Proposed change

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

Checklist

• [x] The code change is tested and works locally.
• [x] 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

Summary by CodeRabbit

Summary by CodeRabbit

• New Features

  • Introduced localized error messaging for various error scenarios, providing clearer guidance and links to documentation.
  • Added a specific error message for invalid URLs, improving user feedback on URL formatting issues.

• Bug Fixes

  • Enhanced robustness of URL validation by ensuring spaces are encoded correctly, preventing issues with improperly formatted URLs.