Replace SimpleMDE with EasyMDE

[fastjames]

Description

SimpleMDE has been abandoned for >6 years and is the subject of an npm security advisory. Replace the outdated library with a EasyMDE, which is a maintained fork of SimpleMDE.

Added dependencies:

• EasyMDE (https://github.com/Ionaru/easy-markdown-editor)

Removed dependencies:

• SimpleMDE (is this project still maintained? (or 5-years abandoned?) sparksuite/simplemde-markdown-editor#829)

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

Manual review steps

1. Step 1
2. Step 2

Manual reviewer: please leave a comment with output from the test if that's the case.

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[adrianthedev]

Is this ready to get merged @fastjames, or do you plan on adding more things?

[fastjames]

Is this ready to get merged @fastjames, or do you plan on adding more things?

I started this because I saw it in the yarn audit output, but I have not tested it very much so that's why it is still in draft.

[fastjames]

@adrianthedev I tried this locally and it rendered the in-place editor on the resource create/edit page and on the resource show page as expected.

[fastjames]

I have opened avo-hq/docs.avohq.io#54 to update the docs for this PR.

[adrianthedev]

Thank you @fastjames!