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

.gitignore

@@ -1,5 +1,8 @@
 build/**
+builds/**
 bin/gdpm
+bin/gdpm-tests
+cache/**
 tests
 */tmp/**
 vgcore.*