[build] update apps_layout.csv from EPSILON_APPS flag in make command

[AngeDieu]

I did it ! It's my first real modification of Upsilon (and of any c++ project) ! :tada:

I fixed a bug : When you buid Upsilon changing the app order with the EPSILON_APPS flag, the layout stayed the old one, and the app you clicked on wasn't the shown one. It's easier to understand with screenshots: and when I click on it, it opens the python app !

To fix it, the apps_layout.csv is automaticly updated from the EPSILON_APPS flag in the make command.

The Default and HidePython layouts are both updated because of the same bug: the layout and the content of the home app isn't synchronized (pressing the graph icon doen't mean go to the graph icon, but go to the app n°x, which can be different from the graph app).

[github-actions[bot]]

.text	.rodata	.bss	.data	Total (RAM)	Total (ROM)
Base	822196 bytes	477549 bytes	226520 bytes	1816 bytes	228336 bytes	1301561 bytes
Head	822196 bytes	477549 bytes	226520 bytes	1816 bytes	228336 bytes	1301561 bytes
+0 bytes	+0 bytes	+0 bytes	+0 bytes	+0 bytes	+0 bytes
+0.0 %	+0.0 %	+0.0 %	+0.0 %	+0.0 %	+0.0 %

[AngeDieu]

I first tried to do this only from the ~/Makefile, adding

apps_layout_list = $(foreach i, $${EPSILON_APPS}, $(if $(filter external, $(i)),,"$(i),"))

.all :
  @echo "Default,$(apps_layout_list)" > apps/home/apps_layout.csv
  @echo "HidePython,$(apps_layout_list)" >>apps/home/apps_layout.csv

But I didn't figure out how to always execute it, whatever we compile. Maybe someone can tell me (at least to know how to do it) ? Thanks.

[github-actions[bot]]

.text	.rodata	.bss	.data	Total (RAM)	Total (ROM)
Base	822196 bytes	477549 bytes	226520 bytes	1816 bytes	228336 bytes	1301561 bytes
Head	822196 bytes	477549 bytes	226520 bytes	1816 bytes	228336 bytes	1301561 bytes
+0 bytes	+0 bytes	+0 bytes	+0 bytes	+0 bytes	+0 bytes
+0.0 %	+0.0 %	+0.0 %	+0.0 %	+0.0 %	+0.0 %