* ci: fix false positive rule for split js translate

- limit regex to must match end of line.
- expand previous check to take care of other ways to split multi-line
  calls.

* ci: update tests for rules, ignore rules in sider

* ci: enable semgrep on v13 branches

* ci: fix false positive for python split strings

- Move rules to .github folder to reduce clutter in root folder
- separate out rules
- add tests for rules
- docs for writing more rules