Categorize examples by features used

[srid]

https://emanote.srid.ca/examples is a flat list right now, but perhaps make it a table - so we can tag each example with the features used.

For eg. https://ners.ch/ and https://blog.hemera.systems/ make good use of templates, so that would be tagged with #template. etc. This way, users looking to find examples of a certain feature can easily find them.