feat: add java presets and api actions

[fbrissi]

Ticket

#541

Description

Adds Java with Gradle and Spring Boot presets, Java database/cache recipes, PostgreSQL 16 template support, and input/API-driven automation actions. This depends on the Java container work in kool-dev/docker-java#69.

Checklist

Java project setup

• Add Java with Gradle and Spring Boot preset definitions
• Document the new Java presets

Java services and recipes

• Add Java database and cache recipes
• Add PostgreSQL 16 template support

Automation actions

• Support input actions and environment references
• Support API-backed single and multi-select prompts

Validation

• Verify go test ./... passes
• Confirm compatibility with dependent docker-java#69 implementation