Run tests for rive_tess

Adds ability to run tests when building rive_tess:

```
cd packages/runtime/tess/build/macosx
./build_tess.sh test
```

Also runs them in GitHub Actions.

Diffs=
265e9c7aa Run tests for rive_tess

tess/build/macosx/build_tess.sh

@@ -20,7 +20,7 @@ pushd ..
 
 CONFIG=debug
 GRAPHICS=gl
-
+TEST=false
 for var in "$@"; do
     if [[ $var = "release" ]]; then
         CONFIG=release
@@ -34,6 +34,9 @@ for var in "$@"; do
     if [[ $var = "metal" ]]; then
         GRAPHICS=metal
     fi
+    if [[ $var = "test" ]]; then
+        TEST=true
+    fi
 done
 
 $PREMAKE --file=./premake5_tess.lua gmake2 --graphics=$GRAPHICS
@@ -50,4 +53,7 @@ $DEPENDENCIES/bin/sokol-shdc --input ../src/sokol/shader.glsl --output ../src/so
 
 make config=$CONFIG -j$(($(sysctl -n hw.physicalcpu) + 1))
 
+if [[ $TEST = "true" ]]; then
+    macosx/bin/$CONFIG/rive_tess_tests
+fi
 popd

tess/build/premake5_tess.lua

@@ -53,4 +53,34 @@ project "rive_tess_renderer"
             { "metal" },
             { "d3d" }
         }
-    }
+    }
+
+project "rive_tess_tests"
+    kind "ConsoleApp"
+    language "C++"
+    cppdialect "C++17"
+    toolset "clang"
+    targetdir "%{cfg.system}/bin/%{cfg.buildcfg}"
+    objdir "%{cfg.system}/obj/%{cfg.buildcfg}"
+    includedirs {
+        "../../dev/test/include",
+        "../include",
+        rive .. "/include",
+        dependencies .. "/sokol"
+    }
+    files {
+        "../test/**.cpp",
+    }
+    links { "rive_tess_renderer" }
+    buildoptions {"-Wall", "-fno-exceptions", "-fno-rtti", "-Werror=format"}
+    defines {"TESTING"}
+
+    filter "configurations:debug"
+        buildoptions {"-g"}
+        defines {"DEBUG"}
+        symbols "On"
+
+    filter "configurations:release"
+        buildoptions {"-flto=full"}
+        defines {"RELEASE", "NDEBUG"}
+        optimize "On"

tess/test/main_test.cpp

@@ -0,0 +1,6 @@
+// The only purpose of this file is to DEFINE the catch config so it can include
+// main()
+
+#define CATCH_CONFIG_MAIN // This tells Catch to provide a main() - only do this
+                          // in one cpp file
+#include <catch.hpp>