Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Encodings/Compiler/CMakeLists.txt

@@ -0,0 +1,19 @@
+# Sources
+file(GLOB SRCS_G "src/*.cpp")
+POCO_SOURCES_AUTO(SRCS ${SRCS_G})
+
+add_executable(EncodingsCompiler ${SRCS})
+set_target_properties(EncodingsCompiler
+	PROPERTIES
+	OUTPUT_NAME tec
+)
+
+target_link_libraries(EncodingsCompiler PUBLIC Poco::Net Poco::Util)
+
+install(
+	TARGETS EncodingsCompiler EXPORT "EncodingsCompilerTargets"
+	LIBRARY DESTINATION lib${LIB_SUFFIX}
+	ARCHIVE DESTINATION lib${LIB_SUFFIX}
+	RUNTIME DESTINATION bin
+	INCLUDES DESTINATION include
+)