Parquet: Add reader and writer without Hadoop dependency

[ebyhr]

Summary

• Fixes Decouple Iceberg from Hadoop codebase #14284

Adds native Parquet file reader and writer implementations that use Iceberg's InputFile/OutputFile abstractions instead of Hadoop's FileSystem, enabling usage without parquet-hadoop runtime dependency.

This allows systems like Trino (which prohibits Hadoop dependencies) to use Iceberg's Parquet module by setting iceberg.parquet-client=NATIVE JVM property.

Hardwood isn't ready for replacement, as far as I've confirmed. From Trino's perspective (one of the major downstream projects), reducing the dependency is preferable to replacing parquet-hadoop with another library. Trino won't use Hardwood anyway.

🤖 Generated with Claude Code

[gunnarmorling]

Hey, just got pointed to this PR by @nssalian (thanks!). You might be interested in the Hardwood project, whose explicit goal is to implement a Parquet reader (and soon writer) without any mandatory dependencies. We're on the homestretch towards 1.0 Final, with quite comprehensive support for most Parquet features at this point. Would love to hear from folks here whether Hardwood could be interesting for the purposes here (we're already talking to Flink folks about integrating Hardwood for its Parquet usage, too).

[anuragmantri]

Use of Hardwood project in Iceberg warrants a discussion in the dev list. @ebyhr / @gunnarmorling would you like to start a thread?

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