[New Extension]: age (Apache AGE)

### Extension Name

age (Apache AGE)

### Extension Description

Apache AGE is a PostgreSQL extension that adds graph database functionality, enabling openCypher query language support alongside standard SQL. It allows storing and querying property graphs directly in PostgreSQL without a separate graph database system.

### Extension Homepage

https://age.apache.org/

### PGDG Package Name

`postgresql-18-age`

### Main LICENSE Link

https://github.com/apache/age/blob/master/LICENSE

### License Compliance

- [x] The extension's license (linked above) complies with the list of allowed licenses.

### Known Dependent Extensions

None

### Component Owner and Maintenance Commitment

- [x] I/My organization commit to becoming the Component Owner and maintaining the extension image in the future.

### Additional Notes (Optional)

A PR implementing this extension will be opened shortly.

### GitHub Handles of Component Owners

@egkristi

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

Non vengono indicati file, test o punti di ingresso. Inizia esaminando come vengono pacchettizzate le estensioni PostgreSQL esistenti in questo repository e nella homepage di Apache AGE; il lavoro è completato quando viene aperta la PR promessa per l’estensione postgresql-18-age e vengono soddisfatti i requisiti di licenza e manutenzione elencati.

Scritto dal modello di indicizzazione a partire dal testo della issue.