Merge branch 'mjs/eamxx/update-docs' (PR #7043)

Improve EAMxx documentation. Most notably, add a developer quick-start guide.

[BFB]

Author: bartgol

.gitignore

@@ -44,7 +44,7 @@ site
 # Ignore mkdocs site-generated files in eamxx
 components/eamxx/site/*
 # Ignore auto-generated eamxx_params.md file
-components/eamxx/docs/common/eamxx_params.md
+components/eamxx/docs/user/eamxx_params.md
 
 # Python packaging
 *.egg-info