`--infer-owner` with `git blame`

**Is your feature request related to a problem? Please describe.**
This is a feature request.

**Describe the solution you'd like**
I would like an option added to hyde, `--infer-owner` (subject to bikeshedding) which instructs hyde to leverage `git blame` (or a comparable command for other version control systems) to make a best guess at the owner of a particular code segment (class, function, file, etc). This could be used to autofill the `owner` field of the emitted YAML and reduce the amount of manual work needed to update one's docs.

**Describe alternatives you've considered**
**Additional context**

No files, tests, or entry points are named. Start by locating how hyde emits the owner field and how command-line options are defined, then determine whether version-control support exists. Done means a documented option can infer an owner for a code segment from git blame or a comparable version-control command.

Written by the indexing model from the issue text.