feat: support custom fallback routes

[fubhy]

PR-Codex overview

This PR adds support for custom fallback routes to the @viem/anvil package. It also includes changes to improve code readability, fix bugs and add types.

Detailed summary

• Added support for custom fallback routes.
• Changed the type of pool in startProxy and createPool to Pool instead of Pool<number>.
• Changed the return type of fetchLogs to Promise<string[]>.
• Improved the regex in parseRequest to handle more cases.
• Added types and type aliases for ProxyResponse, ProxyRequestHandler, ProxyRequestContext, AnvilProxyOptionsFn, InstanceRequestContext.
• Changed the type of options in CreateProxyOptions to AnvilProxyOptions.
• Added a new property fallback to CreateProxyOptions to handle custom proxy requests.
• Fixed a bug where stop would throw an error when trying to stop a non-existent instance.
• Updated the on method in createPool to be typed via the return type instead of using any.
• Added error handling to fetchLogs and createAnvil.
• Improved code readability with better variable names and comments.

The following files were skipped due to too many changes: packages/anvil.js/src/proxy/createProxy.ts

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[changeset-bot]

🦋 Changeset detected

Latest commit: a2fe260

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@viem/anvil	Patch

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[commit-lint]

Features

• support custom fallback routes (3496862)

Chore

• add changeset (a2fe260)

Contributors

fubhy

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[github-actions]

Size Change: +966 B (+8%) 🔍

Total Size: 13.5 kB

Filename	Size	Change
packages/anvil.js/dist/cjs/anvil/createAnvil.js	1.61 kB	+24 B (+2%)
packages/anvil.js/dist/cjs/pool/createPool.js	906 B	-8 B (-1%)
packages/anvil.js/dist/cjs/proxy/createProxy.js	1.31 kB	+326 B (+33%)	🚨
packages/anvil.js/dist/cjs/proxy/fetchLogs.js	408 B	+59 B (+17%)	⚠️
packages/anvil.js/dist/cjs/proxy/parseRequest.js	495 B	+77 B (+18%)	⚠️
packages/anvil.js/dist/esm/anvil/createAnvil.js	1.51 kB	+22 B (+1%)
packages/anvil.js/dist/esm/pool/createPool.js	815 B	-7 B (-1%)
packages/anvil.js/dist/esm/proxy/createProxy.js	1.25 kB	+335 B (+37%)	🚨
packages/anvil.js/dist/esm/proxy/fetchLogs.js	338 B	+56 B (+20%)	🚨
packages/anvil.js/dist/esm/proxy/parseRequest.js	436 B	+82 B (+23%)	🚨

ℹ️ View Unchanged

Filename	Size
packages/anvil.js/dist/cjs/anvil/getVersion.js	316 B
packages/anvil.js/dist/cjs/anvil/stripColors.js	327 B
packages/anvil.js/dist/cjs/anvil/toArgs.js	405 B
packages/anvil.js/dist/cjs/anvil/toFlagCase.js	282 B
packages/anvil.js/dist/cjs/index.js	355 B
packages/anvil.js/dist/cjs/proxy/startProxy.js	725 B
packages/anvil.js/dist/cjs/types.js	124 B
packages/anvil.js/dist/esm/anvil/getVersion.js	239 B
packages/anvil.js/dist/esm/anvil/stripColors.js	260 B
packages/anvil.js/dist/esm/anvil/toArgs.js	334 B
packages/anvil.js/dist/esm/anvil/toFlagCase.js	216 B
packages/anvil.js/dist/esm/index.js	165 B
packages/anvil.js/dist/esm/proxy/startProxy.js	645 B
packages/anvil.js/dist/esm/types.js	64 B

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