Restore P13 Monticello Epicea events on Pharo 14

[Gabriel-Darbord]

Summary

• restore the Pharo 13 EpMonticelloVersionSave and EpMonticelloVersionsLoad Epicea event classes in the Pharo 14 implementation of Pharo13Surface
• add a Pharo 14 surface test covering the restored event names and package-name behavior
• document the restored Pharo 13 Epicea event surface

Context

MCP loads PharoCompatibility with Pharo13Surface before loading its own package. On Pharo 14, MCPackageLoader>>warnAboutDependencies reported missing extension targets for EpMonticelloVersionSave and EpMonticelloVersionsLoad. Pharo 14 removed those concrete classes while still keeping the visitor hooks/predicates, so the compatibility surface restores the missing P13 event contracts.

Verification

• created classes and methods through the routed Pharo 14 MCP image on port 9014
• PharoCompatibilityP13SurfacePharo14Test>>testInstallPharo13SurfaceProvidesMonticelloEpiceaEvents passed in P14
• PharoCompatibilityP13SurfacePharo14Test passed in P14
• git diff --cached --check passed before commit

[Gabriel-Darbord]

Closing this direction. The missing classes are not renamed Pharo 14 APIs; P14 removed the Monticello Epicea event mechanism. We will keep the P12/P13 MCP extensions in an MCP conditional package instead of restoring removed P14 classes in PharoCompatibility.