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

.claude/skills/artifact/templates/SA.md

@@ -0,0 +1,56 @@
+# @TITLE@
+
+## Metadata
+| Key | Value |
+| --- | --- |
+| ID | @ID@ |
+| CrossReference | @CROSSREF@ |
+| Language | @LANGUAGE@ |
+| Domain | @DOMAIN@ |
+
+## Version History
+| Date | Status | Author | Reviewer | Change | Commit |
+| --- | --- | --- | --- | --- | --- |
+| @DATE@ | Proposed | @AUTHOR@ | <reviewer S-ID> | Initial version | pending |
+
+---
+
+## Purpose
+
+<why this analysis exists; methodology followed>
+
+## Stakeholder Summary Table
+
+| ID | Name | Role/Title | Organization | Power Level | Interest Level | Quadrant | Primary Concern (Business Language) |
+| --- | --- | --- | --- | --- | --- | --- | --- |
+| S01 | | | | HIGH / MEDIUM / LOW | HIGH / MEDIUM / LOW | Manage Closely / Keep Satisfied / Keep Informed / Monitor | |
+
+## Power/Interest Classification Rationale
+
+## Primary Concerns and FURPS+ Mapping
+
+| ID | Concern | FURPS+ attribute |
+| --- | --- | --- |
+
+## Communication Requirements
+
+| ID | Channel | Frequency | Deliverable | Phase / Milestone |
+| --- | --- | --- | --- | --- |
+
+## Conflicting Interests and Mitigations
+
+| Conflict | Stakeholders | Mitigation |
+| --- | --- | --- |
+
+## Traceability Analysis
+
+### Business Goal Alignment
+
+| Stakeholder | Concern | Business Case objective |
+| --- | --- | --- |
+
+## Sign-Off
+
+---
+
+@LINKS@