Added CI script, updated dependencies, and fixed bugs

-Added CI yaml file for workflows
-Added `doctest` as dependency
-Added test target executable to CMakeLists.txt
-Renamed `bin` scripts to remove `gdpm*` prefix
-Updated `SQLite 3` dependency in CMakeLists.txt
-Implement basic unit testing in `tests/basic.cpp`
-Fixed issue with handling `fmt` strings

meson.build

@@ -9,6 +9,7 @@ deps = [
 	dependency('RapidJSON'),
 	dependency('fmt'),
 	dependency('Catch2'),
+	dependency('doctest'),
 	dependency('cxxopts'),
 	# dependency('curl'),
 	dependency('curlpp'),