feat(tools): PepNestExport converts PEP nests into benchmark .nest files

Converts a PepApi year of PEP nests into .nest files that keep PEP's own
placements, so OpenNest.Benchmark can score PEP as its Baseline row.

Micro-joint tabs: PEP leaves tabs uncut by jumping them with a rapid, at a
contour's seam or partway along it (a cutout cut as two halves 0.02 apart).
The part still occupies that material, so open cut runs are chained end to
start across gaps up to 0.25 and bridged with a cut line, but only where
they close into a loop, so separate contours that lie close together (two
circles 0.25 apart) are never merged. Previously only seam tabs were closed,
leaving mid-contour tabbed cutouts open and the validator reading them as
garbage regions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/PepNestExport/PepNestExport.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <!-- PepLib.Core lives in the PepApi.Core repo; override with -p:PepLibProject=<path> if it is cloned elsewhere. -->
+    <PepLibProject Condition="'$(PepLibProject)' == ''">$(MSBuildThisFileDirectory)..\..\..\PepApi.Core\PepLib.Core\PepLib.Core.csproj</PepLibProject>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="../../OpenNest.Benchmark/OpenNest.Benchmark.csproj" />
+    <ProjectReference Include="$(PepLibProject)" />
+  </ItemGroup>
+</Project>