github/workflows: add ci

[proppy]

• lint notebooks with https://github.com/nbQA-dev/nbQA
• run notebooks with https://github.com/treebeardtech/nbmake
• exclude analog and xls-workshop #56 #57

TEST=https://github.com/proppy/silicon-notebooks/actions/runs/4045046825 TEST=https://github.com/proppy/silicon-notebooks/actions/runs/4045046823

[proppy]

@mdagois this should catch issue like #54 @msaligane this might be useful to mimic or the code-a-chip repo

/cc @mithro fyi

[proppy]

@bmurmann you might also be interested in this, as it allows to do some validation of change to the jupyter notebooks you maintain.

[proppy]

@pgielda @mgielda @PiotrZierhoffer @umarcor also curious if you have some feedback on the methodology used here for doing CI on jupyter notebooks.