add ISO8601 duration formatting

[fubhy]

Should we add this? If so, I'd add a parser implementation too. The spec isn't clear on how to deal with months and years but I left them out anyways for now which is in line with our existing Duration implementation which also doesn't handle those.

Closes #4319

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🦋 Changeset detected

Latest commit: b9d4a6f

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

This PR includes changesets to release 35 packages

Name	Type
effect	Minor
@effect/cli	Major
@effect/cluster-browser	Major
@effect/cluster-node	Major
@effect/cluster-workflow	Major
@effect/cluster	Major
@effect/experimental	Major
@effect/opentelemetry	Major
@effect/platform-browser	Major
@effect/platform-bun	Major
@effect/platform-node-shared	Major
@effect/platform-node	Major
@effect/platform	Major
@effect/printer-ansi	Major
@effect/printer	Major
@effect/rpc-http	Major
@effect/rpc	Major
@effect/sql-clickhouse	Major
@effect/sql-d1	Major
@effect/sql-drizzle	Major
@effect/sql-kysely	Major
@effect/sql-libsql	Major
@effect/sql-mssql	Major
@effect/sql-mysql2	Major
@effect/sql-pg	Major
@effect/sql-sqlite-bun	Major
@effect/sql-sqlite-do	Major
@effect/sql-sqlite-node	Major
@effect/sql-sqlite-react-native	Major
@effect/sql-sqlite-wasm	Major
@effect/sql	Major
@effect/typeclass	Major
@effect/vitest	Major
@effect/ai	Major
@effect/ai-openai	Major

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[mikearnaldi]

I can't think of an argument against imho

[fubhy]

I can't think of an argument against imho

Alright, let's do it then!