Switch to cmake + vcpkg, builds on linux, windows needs verification.

Code has been modified to be portable.

tests/PgsqlTests/CMakeLists.txt

@@ -0,0 +1,24 @@
+add_executable(PgsqlTests
+    main.cpp
+    tst_Value.cpp
+    tst_ArrayParser.cpp
+    tst_Pgsql_oids.cpp
+    )
+
+target_link_libraries(PgsqlTests PRIVATE
+    pgsql
+    mygtestutils
+    GTest::gtest
+    Qt6::Core
+    )
+
+target_include_directories(PgsqlTests PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    )
+
+set_target_properties(PgsqlTests PROPERTIES
+    CXX_STANDARD 20
+    CXX_STANDARD_REQUIRED ON
+    )
+
+add_test(NAME PgsqlTests COMMAND PgsqlTests)