Add standards subcategory including ASyncAPI and OpenAPI

[benjagm]

Add standards subcategory including ASyncAPI and OpenAPI

Issue Number:

• Closes #47

Screenshots/videos:

If relevant, did you update the documentation?

Summary

Does this PR introduce a breaking change?

[benjagm]

Shouldn't we also update settings.yml to include the updated categories.

The Categories/Subcategories in the settings.yml file is used for excluding elements from the view or just change the order:

# Categories (optional)
#
# Categories information is read from the `landscape.yml` data file. The way
# categories are displayed in the web application is computed dynamically based
# on the number of categories and subcategories, as well as the number of items
# on each. Sometimes, however, we may want subcategories to be displayed in a
# specific order within a category (this happens often in the Members category).
# In those cases, it is possible to define that order by overriding a category.
#
# This option can also be used to not display one or more subcategories in the
# landscape. To achieve that, we only need to exclude the subcategory from the
# subcategories list when overriding a category.
#
# categories:
#   - name: <CATEGORY_NAME>
#     subcategories:
#       - <SUBCATEGORY1_NAME>
#       - <SUBCATEGORY2_NAME>

[DhairyaMajmudar]

One small comment rest everything is looking good : )

[benjagm]

One small comment rest everything is looking good : )

I fixed it with the last push. Thanks! Good catch.