Add delay functionality for laser pulse actions

[XuanMabard]

Adds ifdelay support across action and source modules, including delayed laser pulse handling, plus local config and notebook/backup variants used during development.

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[shijiegu]

Code generally makes sense but why are there so many __init__ variants in fsgui.spikegadgets.action? They are not reachable, or are they? They look like intermediates for testing. If they are, consider adding a testing folder that includes python scripts to call these generator functions and include generated Statescripts; in the test include some string grep to see if needed parameters are properly written in generated Statescripts. If all the variants are needed, consider a refactor (consider kwargs and syntax using **params) and please avoid code duplication.