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/TRN.md

@@ -0,0 +1,60 @@
+# @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
+
+<What the training achieves and the risk it mitigates.>
+
+## Audience and Prerequisites
+
+<Who attends, what they must have read or installed.>
+
+## Learning Objectives
+
+By the end, a participant can:
+
+- <objective>
+
+## Agenda
+
+| Module | Topic | Minutes |
+| --- | --- | --- |
+| 1 | <topic> | <n> |
+
+## Module Notes
+
+### Module 1: <topic>
+
+<Key points and what the facilitator shows.>
+
+## Exercises
+
+### Exercise 1: <name>
+
+<Task, input and expected result.>
+
+## Assessment
+
+<How the facilitator checks each participant, and the pass criteria.>
+
+## Session Record
+
+What is recorded after each session, in the project (never in the framework):
+date, facilitator, attendees, result against the assessment, feedback and
+follow-ups.
+
+---
+
+@LINKS@