Updates to use macros, documentation link updates

[gjanders]

This changes introduces macros:

• s4c_index_internal
• s4c_index_audit
• s4c_index_all
• s4c_index_weather

These macros exist so anyone can use an alternative index name, in my environment I'm providing the application to non-admin users so they have no access to _internal, _audit et cetera

The additional macros:

• s4c_timerange_override_internal
• s4c_timerange_override_audit

Allow flexibility with overriding the time range so I can override index and override the time range searched.

Technically this could be used within the index macro but I thought it would be cleaner to use two macros

Additionally I've changed documentation links to /latest/

Finally, I've used ` in the .mdx files as I believe that will work for the ` symbol, please let me know if that isn't right