addons: sprinkle some more kcoreaddons_add_plugin

... as used by kate_add_plugin

addons/compiler-explorer/CMakeLists.txt

-add_library(compilerexplorer MODULE "")
+kate_add_plugin(compilerexplorer)
 target_compile_definitions(compilerexplorer PRIVATE TRANSLATION_DOMAIN="compilerexplorer")
 target_link_libraries(compilerexplorer PRIVATE KF5::I18n KF5::TextEditor)
 

addons/latexunicodecompletion/CMakeLists.txt

 find_package(Qt5Test ${QT_MIN_VERSION} QUIET REQUIRED)
 
-add_library(latexcompletionplugin MODULE)
+kate_add_plugin(latexcompletionplugin)
 target_compile_definitions(latexcompletionplugin PRIVATE TRANSLATION_DOMAIN="latexcompletionplugin")
 
 target_link_libraries(latexcompletionplugin PRIVATE KF5::I18n KF5::TextEditor)

addons/rainbow-parens/CMakeLists.txt

-add_library(rainbowparens MODULE "")
+kate_add_plugin(rainbowparens)
 target_compile_definitions(rainbowparens PRIVATE TRANSLATION_DOMAIN="rainbowparens")
 target_link_libraries(rainbowparens PRIVATE KF5::TextEditor)