License and branding

[ccarouge]

Fixes #118 and #108

• Add license and copyright files.
• Add copyright notice to all the files and the documentation footer to follow best practices
• Add license mention on documentation home page
• Direct help request to GitHub or forum user support.
• Add license badge in README

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (e9110fa) 85.24% compared to head (521e40e) 85.37%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #209 +/- ## ========================================== + Coverage 85.24% 85.37% +0.13% ========================================== Files 27 27 Lines 1396 1409 +13 ========================================== + Hits 1190 1203 +13 Misses 206 206 ```

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[ccarouge]

@SeanBryan51 I've added the license badge on the README as well. It is broken right now because the LICENSE file needs to be on main to work but that's one less PR. Are you ok with that?

[SeanBryan51]

Yep looks good to me