feat(fls): XMLEncoder reader following java.beans.XMLDecoder

A generic interpreter for the .fls configuration: objects, properties,
calls, indexes, static fields and factories, Field.set, and id/idref
anywhere — including getter results, answered from the measured Java
defaults or reported as unresolved. All 23 corpus files: class and
position of every node as Java reads them, also where Swift loses nodes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/fls/src/index.ts

@@ -1,3 +1,4 @@
 // Public surface of the .fls codec.
 export * from './archive.js';
+export * from './javabeans.js';
 export * from './zip.js';