feat(xlsx): detect table-shaped cell blocks

[RainLib]

Summary

• port the C# high-precision detection of table-shaped XLSX cell blocks
• make query table return real ListObjects plus detectedtable nodes while query listobject remains real-only
• let row[Column op value] fall back to detected blocks only when no real ListObject matches
• preserve comma-bearing header names through structured column resolution
• add the missing detectedtable schema and durable parity documentation

Atomic scope

This PR only changes XLSX table querying and its help/schema surface. It is stacked on PR #14 so the XLSX work remains isolated from DOCX, PPTX, and CLI lifecycle batches.

Validation

cargo fmt -- --check
cargo clippy --all-targets -- -D warnings
cargo test --workspace
cargo test -p xlsx-handler query::tests
cargo test -p officecli --test cli_smoke test_xlsx_detected_table_query_and_row_predicate

The CLI verification creates an XLSX, writes Name / Amount, USD headers and a data row, confirms query table emits /Sheet1/A1:B2 as detectedtable, confirms the comma-bearing row predicate resolves correctly, confirms query listobject stays empty, and confirms help xlsx detectedtable is available.

Merge order

Merge PR #13 first, then PR #14, then this PR. Retarget this PR to main after its base is merged.

[RainLib]

验证完成：

• cargo fmt -- --check：通过
• cargo clippy --all-targets -- -D warnings：通过
• cargo test --workspace：通过
• XLSX detected-table 专项单元测试：通过
• 真实 XLSX create/add/query/help CLI smoke：通过
• 独立 Build & Release 工作流：Lint/Test 与 7 个发布目标全部通过

CI: https://github.com/RainLib/OfficeCli-rust/actions/runs/29796097462

唯一注解是 actions/cache@v4 的 Node.js 20 弃用警告，不影响本 PR 的构建与验证结果。