new app: Caltrain

[quacksire]

Description

Adds a new Caltrain app to check departures of stations and features a BYOK (Bring Your Own Key) system to deal with rate limiting.

I had to make the cache TTL low enough that the time sensitive information would not be too out of date, making people late for their train.

• Train Number colors are dependent on what type of service it is.
• Station names are truncated to fit on screen
• 511 Rate Limit is 60 requests per hour (one per minute), so it shouldn't be a problem
• API key instructions are concise and easy to understand

Future things

• Detect Rate limiting
• Add Alerts (either to this app or others)

EDIT: By default, the API key is not provided, so here's the .gif of it working.

Copilot

copilot:all

[tidbyt]

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Next Steps

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Previews

apps/caltrain/caltrain.star:

[quacksire]

@matslina this is ready to be merged