Add scheme classifications from ATF4 guidance

[robinlovelace-ate]

There is a taxonomy of schemes here that we should bring into the schema. Thanks @dannywilliams for pointing this out: https://www.gov.uk/government/publications/how-to-complete-the-active-travel-fund-4-proforma/guidance-note-for-local-authorities-to-support-completion-of-the-active-travel-fund-4-proforma#type-of-scheme-and-outputs---for-example-miles-delivered-racks-installed

Users should be able to select

• New segregated cycling facility (can do via Route option)
  • I don't think we include length in the schema yet, but we do as derived value in ATIP, although I suggest km rather than "Miles of cycle route".
  • The most problematic issue with this category is that it unhelpfully puts the emphasis on the type of route (segregated) rather than what it achieves.
• New junction treatment (not in option3 as far as I know)
  • Separation in time and space for all active travel movements
  • Protection of key movements for walking and cycling across a junction.
  • Minor advantages to enable defensive positioning.
  • An issue with these is that they are rather subjective, I think these are more for evaluation than for data input?
• ...

[robinlovelace-ate]

And Manual for Streets, which is focussed on street assets.

We may need to include some revenue schemes also. There is an existing taxonomy for this.

[robinlovelace-ate]

There is a placeholder here after #34 https://acteng.github.io/schema/option_atf4/

As far as I can see there is now way to select "New segregated cycling facility" or any of the options in there as intervention types, as far as I can tell from the link above.

[robinlovelace-ate]

I see the ask as more ensuring that these intervention types can be selected from the areas/routes/crossings/furniture/other categories...