Estimate backup size

[timmo001]

Breaking change

Proposed change

Pulls in stats used in storage panel to estimate the backup size. Also estimates the compressed size based on gzip compression (.tar.gz)

Currently there is no way to pull individual addon size (from what I could find), so this is added to the disclaimer when custom is selected and 1-max addons is selected:

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