[Legacy PR #24] Support for displaying a trend line and embedding a right image (by @rahul-deepsource)

[ashrobertsdragon]

Original Author: @rahul-deepsource
Original PR: google#24

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Thanks for the wonderful library!

I wanted to add the functionality to add a trend line which can graphically show how a metric has been varying over time, and thought that this would be a nice addition to this library as well!

Here are a bunch of changes:

• Add show-trend argument which takes in comma-separated list of values (maximum: 10).
• Add --right-image which would display an image (110 x 14) between left and right text.
• Rename --left-color to --bg-color because this was also the background for the right_image, so it didn't really make sense to call it left-color.
• Add a new left-color which would add a

Here is an example:

which was generated using the command:

python -m pybadges --left-text "badge trends" --right-text "2.1k" --whole-link "https://deepsource.io/gh/deepsourcelabs/asgard" --bg-color "#252525" --right-color "#63B439" --logo https://raw.githubusercontent.com/deepsourcelabs/brand-assets/master/logo-white.svg --show-trend 1311,2100,3333,598,800,1111,200 --left-color="#4E4E4E" --embed-logo

There are still a few tests failing (and docs missing). If you give me a green flag that you intend to merge these changes, I'd be happy to provide them as well! :)