Operation request: Multisearch op to allow regex/string matches against multiple terms

## Summary
New op to have multiple search terms of the input. Search terms could be strings or regex. Output choices same as Regex operation

### Example Input
apple orange pear
pear is fruit

Search terms: strings
apple
pear

Search terms: regex
app..
p..r

### Example Output
string: Highlight matches
**apple** orange **pear**
**pear** is fruit

regex:List matches
apple pear
pear