Fix correctness issues in skills, hooks, and dependency checks

[samuelduchesne]

Address shortcomings found in an expert review of the plugin's skills:

• upgrade-version: rewrite around the migrate_model tool (official
  IDFVersionUpdater transition chain) instead of hand-copying objects into
  a new_model, which silently corrupts models across version field/default
  changes. Add forward-only guard and EnergyPlus precondition.
• inject-idf-context.sh: emit PreToolUse hookSpecificOutput.additionalContext
  JSON so the guidance actually reaches the model (plain stdout is ignored on
  PreToolUse); parse file_path via jq; drop the nonexistent get_object tool.
• simulate / quick-sim: add the design-day sizing gate before annual runs and
  correct the unmet-hours criterion to ASHRAE 90.1 G3.1.2.3 (<=300 occupied
  hours each for heating and cooling, not a summed total).
• validate: replace the fabricated Critical/Reference/Warning/Info taxonomy
  with the real ValidationResult shape (ERROR/WARNING/INFO + E0xx/W0xx codes).
• new-model: note new_model seeds only four objects; add required Timestep,
  RunPeriod, Site:Location, infiltration, thermostats, and sizing objects.
• idf-conventions / energy-modeler: drop stale hardcoded tool/resource counts
  and version pins in favor of the live tool surface; fix the vertex example
  to the structured vertices array.
• check-deps.sh: select the newest EnergyPlus install via sort -V instead of
  the lexically-last glob match.
• developing-with-idfkit: use the ${CLAUDE_SKILL_DIR} token so the command
  matches the allowed-tools permission pattern.

https://claude.ai/code/session_01MvFYZxrFeVbiTfnvBVgNRr