Add imagery and timeframe selection

[vgeorge]

Remaining tasks:

• Load AOI previous inferences
• Display timeframe tiles after switching AOIs
• Keyboard shortcuts
• Export AOI
• Disable "Edit AOI" messages until feature is reinstated

[LanesGood]

@vgeorge when testing, I see two issues:

• there are two mosaics present in the southern hemisphere (NAIP and sentinel), and only one in the northern (NAIP). Test locations for northern hemisphere = Washington DC & New Mexico US. Test locations for southern hemisphere = Peru and Brazil.
• When I create an AOI and then select a base mosaic, if I delete my AOI the base mosaic is still selected. To protect against potential issues, we should probably remove the selected base mosaic if the AOI is deleted and there is not already an existing AOI on the project.

[LanesGood]

@vgeorge initial style handled for now. Can we truncate the bounds?

[vgeorge]

@LanesGood thanks for the review. Here are some notes about the changes I made now:

• Added imagery source selector, now the selection sequence is AOI -> Imagery Source -> Mosaic -> Model
• Mosaic and Model list depends on the selected Imagery Source
• Hardcoded data for Imagery Source/Mosaics were updated, but only NAIP should work for running a prediction for now
• The Mosaic selector is a modal, should we use a dropdown as in Figma prototype? It is not clear to me which metadata will we display in cards for Imagery Sources and Mosaics, as this depends on the ongoing API implementation. I used the existing mosaic modal as a base for both of them
• Deleting the current AOI clears selected imagery/mosaic/model
• Update labels for selectors

I'm not planning on adding further changes until developmentseed/pearl-backend#43 is added to developmentseed/pearl-backend#38. I believe it would be better to have them ready before we finish hooking the logic to the UI.

cc @geohacker

[LanesGood]

@vgeorge yes, I think the preset mosiac timeframe selection should come from a dropdown list, if it is possible to format as [Jan -Mar 2022, Apr - Jun 2022, Jul - Sep 2022] etc.

Should we use the term "mosaic" in the UI? I think "Timeframe" is more approachable for users, but am not certain if this is 100% accurate.

Deleting the current AOI clears selected imagery/mosaic/model

To confirm, this sounds correct when no AOI/prediction run has yet been executed. When a prediction has already been run, we don't need to clear the imagery/mosaic/model

[vgeorge]

As part of the branch reorganization described in #71, this is ready to be merged.