MATLAB/Octave nodes get empty reads: concore_literal_eval.m / concore_literal_serialize.m are not copied into studies #648

Since #575, concore_read.m, concore_write.m, concore_initval.m and concore_default_maxtime.m call concore_literal_eval / concore_literal_serialize, but mkconcore copies the MATLAB/Octave runtime into out/src from a fixed list that doesn't include those two files. So every generated .m node is missing them.

In concore_read.m the parse is inside try/catch, so the "undefined function" error turns into parsed = [] and the read silently returns empty. With demo/sampleM.graphml on Windows (Octave 11.3) the controller stops at the first read:

error: ym(1): out of bound 0 (dimensions are 0x0)
error: called from
    controller at line 3 column 6
    controllerM at line 17 column 5

in1/ym exists and contains [1.0, 0.01]; calling concore_literal_eval in the node folder gives 'concore_literal_eval' undefined. With the two files copied into the node folder, the same study runs the full loop.

CI doesn't catch this because the MATLAB job runs from the repo root, where the helpers are on the path.

I have a small fix with a test and will open a PR against dev.