[BUG] Restore dbutil module, formerly supplied by shared-resources

[joewiz]

Describe the bug

Loading eXide 3.0.0 on a stock eXist 5.3.0 system produces a console error when eXide calls this URL:

http://localhost:8080/exist/apps/eXide/modules/deployment.xql?info=__new__1

The error:

<exception>
    <path>/db/apps/eXide/modules/deployment.xql</path>
    <message>err:XQST0059 error found while loading module dbutil: failed to load module:
        'http://exist-db.org/xquery/dbutil' from: 'http://exist-db.org/xquery/dbutil', location:
        'http://exist-db.org/xquery/dbutil'. Source not found. </message>
</exception>

The cause is that #309 removed the declared dependency on shared-resources but left a reference to it in deployment.xql and search.xql.

Until this module is released in a standalone package, the shortest path to a solution may be to embed the library module in eXide.