refactor: Restructure project into sources/tests layout and dissolve PluginLLMCore

tests/CMakeLists.txt

@@ -0,0 +1,30 @@
+add_executable(QodeAssistTest
+    ../sources/completion/CodeHandler.cpp
+    ../sources/completion/LLMClientInterface.cpp
+    ../sources/completion/LLMSuggestion.cpp
+    ../sources/providers/Provider.cpp
+    CodeHandlerTest.cpp
+    ClaudeCacheControlTest.cpp
+    DocumentContextReaderTest.cpp
+    LLMSuggestionTest.cpp
+    # LLMClientInterfaceTests.cpp
+    unittest_main.cpp
+)
+
+target_link_libraries(QodeAssistTest PRIVATE
+    Qt::Core
+    Qt::Test
+    GTest::GTest
+    GTest::gmock
+    GTest::Main
+    QtCreator::LanguageClient
+    Context
+    QodeAssistLogger
+    LLMQore
+)
+
+target_include_directories(QodeAssistTest PRIVATE ${CMAKE_SOURCE_DIR}/sources)
+
+target_compile_definitions(QodeAssistTest PRIVATE CMAKE_CURRENT_SOURCE_DIR="${CMAKE_CURRENT_SOURCE_DIR}")
+
+add_test(NAME QodeAssistTest COMMAND QodeAssistTest)