Add Strong’s number lookup endpoint and code normalization

Problem/Motivation

The Bible module does not currently support Strong’s number lookup or normalization for legacy/canonical code forms. This limits integration with datasets and user interfaces that rely on Strong’s numbers for lexical lookups.

Steps to reproduce

N/A (feature request)

Proposed resolution

- Adds a backend endpoint for Strong’s number lookup at /bible/strong/{code}.
- Implements code normalization for both canonical (H/G) and legacy numeric forms (8xxxx/9xxxx).
- Includes tests and documentation.

Remaining tasks

- Review and merge the attached patch.

User interface changes

None