feat(assets): setup assets for resource manager

assets are broken into static (compiled into the binary) and dynamic (handled by the resource manager). All static assets should define a meson.build, all dynamic assets must have handlers written in src/resource/resourceManager and resourceManagerTypes

BREAKING CHANGE:

assets/dynamic/index.yaml

@@ -0,0 +1,4 @@
+eos:
+  helm: "eos/helm_table.dat"
+mesh:
+  sphere: "mesh/sphere.msh"

assets/static/meson.build

@@ -0,0 +1 @@
+subdir('const')