Issue1482 Open Modelica errors and syntax warnings

[LoneMeertens]

Fix OpenModelica Syntax Errors in PPD12 and PVT Validation Models

This PR resolves syntax and parsing issues reported in #1482, which prevented IDEAS v4.0.0 (master) from loading in OpenModelica 1.25.5. All changes are backward‑compatible with Dymola.

Summary of Fixes

• PPD12 Structure.mo: removed invalid escape sequences (\e, \<) in the Documentation annotation that caused OpenModelica lexer warnings.
• PVT validation models: removed unsupported break statements from
  • Fluid/PVTCollectors/Validation/PVT_UI/PVTQuasiDynamicCollectorValidation.mo
  • Fluid/PVTCollectors/Validation/PVT_UN/PVTQuasiDynamicCollectorValidation.mo
• R410A package.order: removed duplicate entries (A, B, C) which referenced protected constants not meant to appear in package.order.

Impact

• IDEAS loads cleanly in OpenModelica 1.25.5 without syntax or parser warnings.
• Dymola compatibility is preserved.
• PVTCollectors package becomes usable again in OM (relevant for ongoing work in Issue1473 pvt validation ext #1481).
• No model behaviour or numerical results are affected.