Add adhoc script template

[codchen]

Describe your changes and provide context

Add a template to run arbitrary read-only script. Usage:

1. add your query logic in the script
2. find a node with the state you want to run the script on (e.g. a detached pacific-1 node)
3. make install with your updated query logic
4. stop seid
5. seid script

Testing performed to validate your change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.29%. Comparing base (8095774) to head (02d227f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2047   +/-   ##
=======================================
  Coverage   61.28%   61.29%           
=======================================
  Files         264      264           
  Lines       24566    24566           
=======================================
+ Hits        15056    15058    +2     
+ Misses       8384     8381    -3     
- Partials     1126     1127    +1     

see 1 file with indirect coverage changes