extend intel.log with additional fields using corelight/ExtendIntel

[mmguero]

• corelight/ExtendIntel

We could be getting more useful information from our zeek intelligence matches, and this plugin can help us do that

• add plugin to list of plugins to install
• add new fields to intel.log parsing
• see if there are any mutations or normalizations or time field conversions that need to be done for the new fields
• as much as possible, rename all possible fields to be their ECS names
• add any remaining fields not covered by ECS to the template and config.ini and the allFields array for the value actions for Arkime
• see if there's anything else we need to do in https://github.com/idaholab/Malcolm/blob/main/shared/bin/zeek_threat_feed_utils.py to make sure those new fields get populated (see also the zeek docs)
• update the intel dashboard if needed