Tool widgets

[kylecorry31]

• Quick action to open widgets panel
• Support for half width widgets
• Add widgets to tool registry
• Detect if the widget is running in app or on a homescreen
• Allow widgets to hide themselves
• Let user choose which widgets to show
• Trigger a widget refresh
• Navigation
• Current weather
• Sunrise / set
• Moon
• Current tide
• Nearby beacons (list)
• Recent notes
• Elevation
• Compass
• Speedometer
• Location
• Pedometer (steps + distance)
• Clock (analog and digital)

To be split out:

• Let user reorder widgets
• Pressure + tendency
• Nearby (radar compass)
• Pressure chart
• Temperature chart
• Humidity chart
• Sun/moon chart
• Map (thumbnail)
• Tide table (eventually show the tide chart)
• Meteor shower
• Eclipse
• Quick actions (homescreen widget only)

These in app widgets will eventually be exposed as home screen widgets.

Originally posted by @HidingInEmptySpace in #316 (comment)

Option to display when battery is low (maybe related to #2413) and as a quick action.

[kylecorry31]

Design:

This will be a quick action that launches a widgets bottom sheet.

Tools can specify widgets just like they do quick actions. Widgets are full width views and they should all be 150 dp tall. They will be similar to cards in the old Google Now. I also want to look into half width widgets (the layout algorithm could place half width widgets next to eachother). If the half width widgets are below a certain size, make them full width.

Widgets should open the associated tool when clicked (most likely).

The user can change which widgets are shown in the Tools settings.

Widgets should be read only.