Fixes compilation errors and integrates project module:

- src/app/eiffel/web.go: Fix navigation URL from '/project/list' to correct route
- src/app/project/model.go: Fix struct tags syntax (backticks instead of quotes)
- src/app/project/web/web.go: Add missing import for project package
- src/cmd/web/main.go: Add imports and register project module with MongoDB manager

The project module code was already implemented, these changes just fix
integration issues to make it work with the existing HARMONY architecture.