Add Josuttis' Belle Views to C++ compiler (#4452)

etc/config/c++.amazon.properties

@@ -1939,7 +1939,7 @@ compiler.nvcxx_arm_cxx22_9.semver=22.9
 #################################
 #################################
 # Installed libs
-libs=abseil:benchmark:benri:blaze:boost:bmulti:brigand:catch2:cctz:cmcstl2:cnl:cppcoro:cppitertools:crosscables:ctbignum:ctre:date:dataframe:dawjson:dlib:doctest:eastl:eigen:enoki:entt:etl:eve:expected_lite:fastor:fmt:gemmlowp:glm:gnufs:gnulibbacktrace:googletest:gsl:hdf5:hedley:hfsm:highfive:highway:hotels-template-library:immer:jsoncons:jsoncpp:kiwaku:kumi:kvasir:lager:lagom:lexy:libassert:libguarded:libsimdpp:libuv:llvm:llvmfs:lua:magic_enum:mfem:mlir:mp-coro:mp-units:namedtype:nanorange:nlohmann_json:nsimd:ofw:openssl:outcome:pegtl:pipes:pugixml:python:rangesv3:raberu:scnlib:seastar:seqan3:simde:sol2:spdlog:spy:stdexec:taojson:tbb:tlexpected:toml11:tomlplusplus:trompeloeil:tts:type_safe:unifex:vcl:xercesc:xsimd:xtensor:xtl:ztdtext:zug:cli11:avr-libstdcpp:curl:copperspice
+libs=abseil:belleviews:benchmark:benri:blaze:boost:bmulti:brigand:catch2:cctz:cmcstl2:cnl:cppcoro:cppitertools:crosscables:ctbignum:ctre:date:dataframe:dawjson:dlib:doctest:eastl:eigen:enoki:entt:etl:eve:expected_lite:fastor:fmt:gemmlowp:glm:gnufs:gnulibbacktrace:googletest:gsl:hdf5:hedley:hfsm:highfive:highway:hotels-template-library:immer:jsoncons:jsoncpp:kiwaku:kumi:kvasir:lager:lagom:lexy:libassert:libguarded:libsimdpp:libuv:llvm:llvmfs:lua:magic_enum:mfem:mlir:mp-coro:mp-units:namedtype:nanorange:nlohmann_json:nsimd:ofw:openssl:outcome:pegtl:pipes:pugixml:python:rangesv3:raberu:scnlib:seastar:seqan3:simde:sol2:spdlog:spy:stdexec:taojson:tbb:tlexpected:toml11:tomlplusplus:trompeloeil:tts:type_safe:unifex:vcl:xercesc:xsimd:xtensor:xtl:ztdtext:zug:cli11:avr-libstdcpp:curl:copperspice
 
 libs.abseil.name=Abseil
 libs.abseil.versions=trunk
@@ -1948,6 +1948,13 @@ libs.abseil.staticliblink=absl_bad_any_cast_impl:absl_failure_signal_handler:abs
 libs.abseil.versions.trunk.version=trunk
 libs.abseil.versions.trunk.path=/opt/compiler-explorer/libs/abseil
 
+libs.belleviews.name=Belle Views
+libs.belleviews.url=https://github.com/josuttis/belleviews
+libs.belleviews.versions=trunk
+libs.belleviews.description=A library of C++ views that just works for all basic use cases as expected.
+libs.belleviews.versions.trunk.version=trunk
+libs.belleviews.versions.trunk.path=/opt/compiler-explorer/libs/belleviews/trunk/sources
+
 libs.benchmark.name=Google Benchmark
 libs.benchmark.versions=trunk:120:130:140:141:150:161:162
 libs.benchmark.url=https://github.com/google/benchmark