[enhancement] New Graphics implementation with algorithm for spirograph (#936)

* added spirograph program

* add graphics forlder to cmake

* updating DIRECTORY.md

* enable VNC for GUI programs on gitpod

* fix cpplint error

* fix macro definitions for correct documentation

* fix filename in docs

* move include from namespace to global

* download and build freeglut if not available

* install opengl libraries for build check

* fix syntax error

* fix quotes

* install mesa-utils instead

* use markepplace tool instead of installing

* fix syntax

* undo changes to github actions

* OpenGL not mandatory

* add private option to compile definition

* fix: corrected to compile definitions instead of options

* use the macro USE_GLUT

* compile FREEGLUT as a subdirectory. this maintains a consistency

* build freeglut_static when GLUT library not available

* provide keyboard control

* clang-tidy fixes for cb284bddb2

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

.gitpod.dockerfile

@@ -1,9 +1,9 @@
-FROM gitpod/workspace-full
+FROM gitpod/workspace-full-vnc
 
 RUN sudo apt-get update \
- && sudo apt-get install -y \
-    doxygen \
-    graphviz \
-    ninja-build \
- && pip install cpplint \
- && sudo rm -rf /var/lib/apt/lists/*
+   && sudo apt-get install -y \
+   doxygen \
+   graphviz \
+   ninja-build \
+   && pip install cpplint \
+   && sudo rm -rf /var/lib/apt/lists/*