feat: expand advanced elicitation methods with 19 new techniques (#2062)

Adds 19 new elicitation methods across 7 categories including a new
'framing' category. All existing 50 methods preserved. Entries sorted
alphabetically by category then method name.

New methods added:
- advanced: Chain-of-Thought Scaffolding, Few-Shot Exemplar Priming
- collaboration: Six Thinking Hats, Delphi Method
- core: Second-Order Thinking, Inversion Analysis, Problem Decomposition,
  Analogy Mapping, Steelmanning
- creative: Constraint Injection, Morphological Analysis
- framing (new): Abstraction Laddering, Reframe the Question,
  Stakeholder Lens Rotation
- learning: Deliberate Practice Loop
- research: Source Triangulation
- risk: Assumption Audit, Cascading Failure Simulation
- technical: Boundary & Edge Case Sweep

Closes #2061

Co-authored-by: Brian <bmadcode@gmail.com>
Co-authored-by: Alex Verkhovsky <alexey.verkhovsky@gmail.com>