rename the go module path from github.com/dropalldatabases/sif to
github.com/vmfunc/sif across go.mod, all imports, the golangci exclude
list, release install docs and docs. pure string rename, no logic change.
- add docs/ with installation, usage, modules, scans, and api docs
- add docs link to main readme
- fix release.yml to bundle modules directory with releases
- add module system tests to runtest.yml
- standardize go version to 1.23 across workflows