feature: add oneshot template

Author: marc0der

prompts/00-oneshot-template.md

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+# [Feature Name] Feature
+
+## Preamble
+
+Generate a new feature that implements [scope description], namely the **[feature name]**. This feature should be implemented across the following architectural components:
+
+* API/Controller Layer
+* Domain/Service Layer
+* Repository/Data Access Layer
+* Infrastructure Components
+* Cross-cutting Concerns (logging, error handling, etc.)
+
+Do NOT implement business logic in the controller layer or mix concerns across layers!
+
+The implementation should follow existing patterns in the codebase and integrate with the current architecture.
+
+## Technical Requirements
+
+* API Specification (endpoints, request/response models)
+* Data Models and DTOs
+* Service Interfaces
+* Error Handling Cases
+* Performance Considerations
+* Security Requirements
+
+## AI Guidelines
+
+* follow the Kotlin style guide rules @kotlin-rules.md
+* follow the Testing rules @testing-rules.md
+* follow the DDD guideline rules @ddd-rules.md
+* follow the Hexagonal Architecture rules @hexagonal-architecture-rules.md
+
+## Infrastructure Considerations
+
+* Required External Services/Dependencies
+* Configuration Requirements
+* Deployment Considerations
+* Monitoring/Observability Requirements
+* Cache Strategy (if applicable)
+* Rate Limiting Requirements (if applicable)
+
+## Error Scenarios
+
+* Invalid Input Handling
+* External Service Failures
+* Resource Not Found Cases
+* Authorization Failures
+* Rate Limit Exceeded
+* System Resource Constraints
+
+## Gherkin Scenarios
+
+```gherkin
+Feature: [Feature Name]
+    Scenario: Successful Operation
+        Given [precondition]
+        When [action]
+        Then [expected outcome]
+
+    Scenario: Invalid Request
+        Given [precondition]
+        When [action]
+        Then [expected error response]
+
+    Scenario: Resource Not Found
+        Given [precondition]
+        When [action]
+        Then [expected error response]
+
+    Scenario: Authorization Failure
+        Given [precondition]
+        When [action]
+        Then [expected error response]
+```
+
+## Testing Requirements
+
+* Unit Tests Coverage
+* Integration Tests Scope
+* Acceptance Tests Scope
+* Mock/Stub Requirements
+* Supporting Test Containers
+* Test Container Integration
+* Test Data Setup
+
+## Acceptance Criteria
+
+* API Contract Compliance
+* Error Handling Requirements
+* Performance Thresholds
+* Security Requirements
+* Documentation Requirements
+* Monitoring/Logging Requirements