Open an imported Soroban contract directly in the project explorer

[Hey-Yetunde]

Problem

Finding the contract entry point after import takes clicks.

Context

Project explorer deep-links to files (/workspaces/<id>/projects/<pid>); detection knows contract paths.

Technical requirements

• When a project is detected as Soroban, expose the likely contract entry point (src/lib.rs or first contracts/*/src/lib.rs) and link to it from the project page/analysis panel.

Acceptance criteria

• The entry-point link is correct for detected projects.

Testing requirements

• Detection-driven tests.

Dependencies

• Detection (implemented), Stellar panel (if landing first).

Difficulty

Medium

Priority

Low