feat: support core Lumina index build

[QuakeWang]

Purpose

Rust already supports reading Lumina global indexes, but it did not have a core path to build Lumina index files from table data and commit them into the index manifest. Index-only commits were also skipped, so the generated index metadata could not create a new snapshot.

Brief change log

• Add LuminaIndexBuildBuilder on Table.
• Plan Lumina shards by global row id and global-index.row-count-per-shard.
• Extract ARRAY<FLOAT> vectors with strict _ROW_ID continuity validation.
• Build Lumina index files under index/lumina-global-index-*.index.
• Commit Lumina IndexFileMeta with canonical index_type = "lumina" and global row range metadata.
• Support metadata-only index commits and reject overlapping global index ranges.
• Fail fast for unsupported primary-key and deletion-vector tables.

Tests

API and Format

Documentation