Add Pretty Table project: plan, accepted documents and code

Business Case, Stakeholder Analysis, Project Plan and milestone MIL-001
with review records RC-001 to RC-003, then the Python project: PrettyTable
Pokemon table, constants, pytest tests, pyproject.toml, Doxyfile, CI
workflow and README.

Task: MIL-001#1
Task: MIL-001#2
Task: MIL-001#3
Task: MIL-001#4
Task: MIL-001#5
Task: MIL-001#6
Task: MIL-001#7
Task: MIL-001#8

.agents/skills/artifact/templates/DCD.md

@@ -0,0 +1,50 @@
+# @TITLE@
+
+## Metadata
+| Key | Value |
+| --- | --- |
+| ID | @ID@ |
+| CrossReference | @CROSSREF@ |
+
+## Version History
+| Date | Status | Author | Reviewer | Change | Commit |
+| --- | --- | --- | --- | --- | --- |
+| @DATE@ | Proposed | @AUTHOR@ | <reviewer S-ID> | Initial version | pending |
+
+---
+
+## Purpose and Scope
+
+## Diagram
+
+```plantuml
+@startuml
+class Controller {
+  -repo : Repository
+  +operationName(param : Type) : ReturnType
+}
+class Entity
+Controller --> Entity : uses
+@enduml
+```
+
+## Class Table
+
+| Class | Refines (Domain Model concept) | Responsibility | Attributes | Operations |
+| --- | --- | --- | --- | --- |
+
+## Method Traceability
+
+| Method signature | Operation Contract / SD message |
+| --- | --- |
+
+## Pattern Annotations
+
+| Pattern | Classes | Rationale |
+| --- | --- | --- |
+
+## Dependency Check
+
+---
+
+@LINKS@