fix(pptx): reject adjust handles undeclared by the preset geometry (#235)

[jasonwei1002]

Fixes #235.

Root cause

Real PowerPoint validates every <a:gd name="…"> in a shape's avLst against the guide names the preset's ECMA-376 definition declares, and refuses the file (0x80070570, "repair/corrupt" dialog) on any mismatch. ApplyAdjustHandles already guarded two slices of this (the R18 donut/noSmoking remap and the R19b multi-guide subset fix for 5 star/hexagon presets), but presets outside those hand tables fell through to verbatim pass-through — most damagingly presets that declare no adjust guides at all (rect, ellipse, line, … 64 of the 187 presets), where any authored adj= silently produces an unopenable file while validate stays green.

Change

One mechanism replaces the two hand-maintained tables: PresetAdjustGuides, a complete map of all 187 preset geometries → declared guide names + spec-default formulas, generated from the ECMA-376 presetShapeDefinitions.xml. ApplyAdjustHandles now authors the avLst strictly per the preset's declaration:

• Zero-guide presets: adj= is rejected with an actionable error instead of writing a corrupt file.
• Single-guide presets: the position-0 name is remapped to the declared name — generalizing the existing donut/noSmoking special case to all of them (e.g. adj1 on roundRect now yields adj instead of a corrupt file); extra handles are rejected.
• Multi-guide presets: undeclared names are rejected listing the valid ones, and the complete guide set is always emitted with spec defaults filling unsupplied guides — extending the existing hexagon/star5/6/7/10 behavior to every multi-guide preset, which fixes the same subset corruption for e.g. round2SameRect authored with only adj1.

The generated defaults for the 5 previously hand-listed presets are byte-identical to the old MultiGuidePresetDefaults entries. Unknown/custom presets keep today's pass-through behavior.

Verification (macOS, net10.0 build of this branch)

$ officecli add t.pptx '/slide[1]' --type shape --prop geometry=rect ... --prop adj="adj:val 14000"
Error: Preset geometry 'rect' has no adjust handles; remove the adj= property. ...

$ ... --prop geometry=roundRect --prop adj="adj1:val 20000"     # remapped
<a:prstGeom prst="roundRect"><a:avLst><a:gd name="adj" fmla="val 20000"/></a:avLst>

$ ... --prop geometry=round2SameRect --prop adj="adj1:val 20000" # completed
<a:gd name="adj1" fmla="val 20000"/><a:gd name="adj2" fmla="val 0"/>

$ ... --prop geometry=downArrow --prop adj="adj3:val 1"
Error: Adjust handle 'adj3' is not declared by preset geometry 'downArrow'. Valid handles: adj1, adj2.

Output files re-verified with an independent reader (python-pptx). dotnet build clean (the single CS8602 warning is pre-existing in ExcelHandler.SheetShift.cs).

Per CONTRIBUTING Rule 1 this PR is one atomic change: "author avLst strictly per the preset's ECMA-376 declaration". A follow-up candidate (not included): make validate flag pre-existing illegal <a:gd> entries in already-authored files using the same table.