feat(portal): add caching interface to sw portal routing

[Tzal3x]

Adds caching to the routing logic.

• Implement the routing cache interface for the service worker portal
• Implement the routing cache interface for the server portal

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
walrus-sites-sp	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 9, 2024 0:47am
walrus-sites-sw	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 9, 2024 0:47am

[codspeed-hq]

CodSpeed Performance Report

Merging #236 will degrade performances by 58.49%

_{Comparing 220-add-caching-interface-to-portal-routing (2b60e6d) with 220-integrate-routing-to-portal (e86a2b6)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 5 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	220-integrate-routing-to-portal	220-add-caching-interface-to-portal-routing	Change
⚡	decompress plaintext encoding	18 µs	15.9 µs	+13.76%
❌	fetchPage: should successfully fetch the mocked landing page site	9.2 ms	22.1 ms	-58.49%

[Tzal3x]

Open questions:

• Expiration date.
• Update Routes when ws-resources.json changes.
• Does a new db get created for every walrus site? If so, can we avoid it and use the same index/schema for all?