feat: add make verify infrastructure with expected outputs

[yeongseon]

Summary

Adds make verify / make demo infrastructure and expected output files for all 12 fundamentals examples. Replaces #8 (branch was deleted, repo restructured since).

Changes

• scripts/normalize_output.sh — Normalizes dynamic values (VERSION, HOSTNAME, DATE, TIME, OID, BTREE, TIMESTAMP) and filters SQLAlchemy warnings for reproducible diff comparison
• 12 expected output files — Generated from live CUBRID 11.2 runs, covering:
  • 6 pycubrid fundamentals (connect, crud, transactions, prepared-statements, error-handling, lob-handling)
  • 6 SQLAlchemy ORM basics (engine, core, orm, relationships, dml_extensions, reflection)
• Makefile — Added verify (find expected files → run script → normalize → diff) and demo (up + verify) targets; simplified to Python-only per AGENTS.md
• fundamentals/orm-basics/04_relationships.py — Sorted joined collection output for deterministic results
• GETTING_STARTED.md — Simplified from 313 lines to 14 lines with 3-line quick start

Verification

$ make verify
  ✓ PASS ./fundamentals/connect/01_connect.py
  ✓ PASS ./fundamentals/crud/02_crud.py
  ✓ PASS ./fundamentals/error-handling/05_error_handling.py
  ✓ PASS ./fundamentals/lob-handling/06_lob.py
  ✓ PASS ./fundamentals/orm-basics/01_engine.py
  ✓ PASS ./fundamentals/orm-basics/02_core.py
  ✓ PASS ./fundamentals/orm-basics/03_orm.py
  ✓ PASS ./fundamentals/orm-basics/04_relationships.py
  ✓ PASS ./fundamentals/orm-basics/05_dml_extensions.py
  ✓ PASS ./fundamentals/orm-basics/06_reflection.py
  ✓ PASS ./fundamentals/prepared-statements/04_prepared.py
  ✓ PASS ./fundamentals/transactions/03_transactions.py
Results: 12 passed, 0 failed, 0 skipped

Issue Progress

Closes #8 (reimplemented from scratch after branch deletion and repo restructure)

Partial progress on #7:

• make verify target
• make demo target
• Expected outputs for fundamentals (pycubrid + SQLAlchemy)
• GETTING_STARTED.md simplified to 3-line quick start
• Expected outputs for migration/, quickstart/, templates/ (separate PR)