Add HTCondor integration test and update Dockerfile

- Update development Dockerfile to install HTCondor package
- Create plugin_htcondor_test.go with integration test
- Test configures mini HTCondor with pelican plugin
- Test starts data federation and verifies file transfers

Author: Copilot

_typos.toml

@@ -18,6 +18,8 @@ NewCFBEncrypter = "NewCFBEncrypter"
 ## HTCondor's daemon names follow the usual "{word} + 'd'" convention.
 StartdAttrs = "StartdAttrs"
 condor_startd = "condor_startd"
+STARTD = "STARTD"
+Startd = "Startd"
 
 [files]
 extend-exclude = [