Update metadata creation and fix a couple bugs

[mosc5]

Fixes random issues

Changes proposed in this pull request:

• Update metadata to include information about home charging probability and region types to use in TracBEV

The following steps were realized (required):

• Correct formatting with black src
• Add the description of your changes to the CHANGELOG.md in subsection with release name [Unreleased] and state the PR number with #

Also the following steps were realized if applicable:

• Write docstrings to your code
• Write test(s) for new patch of code