Restructure input data for example models

[tsmbland]

Description

Restructuring the example models to be clearer for new users.

Easiest just to look at the new version of the default model

Main changes:

• got rid of the "Technodata" folder - sector folders now live at the top level
• renamed the "preset" folder to "residential_presets" to match the sector name
• got rid of the "inputs" folder - these files now live at the top level (along with the "Agents.csv" file in cases where agents are shared between sectors)
• removed the "BaseYearImport" and "BaseYearExport" files as these weren't being used
• removed some optional parameters from the settings file (lpsolver, constraints, dispatch_production, demand_share)
• restructured the settings file to a more logical order (e.g. outputs at the end)
• updated wizard.py to work with the new structure
• deleted test_factory_constraints_passed_to_agents because it was annoying me (oops)

This is just about changing the example models rather than the code, so shouldn't have any effect on other models. Users can still structure their files however they want as long as they link their files properly in the settings file, but I think the structure here is simpler/less convoluted than what we had before so should be clearer for new users.

Notes:

• for some very strange reason this changes the results for the modify-time-framework tutorial model. I can't conceive why, but that model was already giving strange results (see Odd results when existing capacity data doesn't match the time framework [BUG] #371) so I'm not too concerned, and perhaps there might be a clue here for fixing that issue

Fixes #666

[tsmbland]

@martinstringer Have a quick look at the default model linked above and let me know what you think. I'm not changing the contents of any of the files (except the settings file), just restructuring.

It's almost what we discussed, but I've got rid of the input/global_input_files folder as I don't really think it's necessary.

All just convention though, any structure will still work as long as the files are linked correctly in the settings file

[tsmbland]

@dalonsoa This one's probably annoying to review and I'm keen to avoid marge conflicts so going to merge now