feat: create static bounty listing view

[lambdakilo]

Summary

Created static bounty listing view with the following prompt:

plan mode fable 5 max
i have the task of creating a bounty list view as in the landing page/ main view where bounties are listed in satcode repo. i was thinking on copying the bare bones of the main view from satcode-demo from .. and try to understand what are the actual minimum components generated there by ai so that i can learn svelte and not just use the same generated svelte code. the bounties dont need to have functionality not even mock data. does this sound good to you?

 ● Who should write the code — me, or you with my guidance?
   → Claude implements (Recommended)
 ● How 'bare bones' should the list be? You said no functionality and no mock data — but a tiny placeholder array unlocks the core Svelte concepts ({#each}, props). Which shape do you want?
   → Card + {#each} array (Recommended)
 ● How should it look? The demo's dark bitcoin-orange theme would need translating from Tailwind 3 (JS config) to satcode's Tailwind 4 (@theme in CSS).
   → Port demo theme (Recommended)
 ● Besides the card grid, how much page chrome should the landing view have?
   → Heading + list (Recommended)```

Related issue

Closes #6

Changes made

• Changed src/app.html
• created src/lib/components/BountyCard.svelte
• created src/lib/format.ts (can be removed if reviewers think its bloat but also be useful for btc, cashu types as well in the future)
• created src/lib/types/bounty.ts so that no bounty is accidentally created without one of the possible enums
• changed src/routes/+page.svelte. i think routing works that /+page.svelte is the root and /about/+page.svelte is the /about path etc.
• changed src/routes/layout.css to match tailwind 4 syntax instead of 3

Author checklist

• Matches the spec
• Checks passed
• bun run format run
• bun run lint shows no errors
• bun run build succeeds
• I tested the relevant changes manually

Reviewer checklist

• cehck if bun run format, lint, build and check work on your machine
• check that bun run dev creates a bounty listing page that matches the page that you would wanna build the next feats. upon
• check that no seeming bloat on edited files

[guildm4ster]

LGTM 👍