"kpm build" shows detailed dependency information by default

- Make output format of "kpm pack" consistent with "kpm build"
- Use assembly paths from metadata references
- Add "Building {project} for {framework}"
- Reuse exports produced by LibraryManager
Revert "kpm build" detailed dependency information
Adjusting output severities

http response status and timing should have same treatment as request
report severity enum should not divide output between stdout and stderr
"kpm pack" generates bash scripts for entry points
Improve functional test utilities
Add functional tests for script generation