feat(manifest): add ManifestFilterManager and ManifestMergeManager (#652)

Implement two manifest management classes for table write operations:

- ManifestFilterManager: filters manifest entries by row filter
expression, file path, or partition value; supports
FailMissingDeletePaths validation. Rewrites manifests that contain
matching files, marking entries as DELETED; passes through manifests
that cannot contain matching files unchanged.

- ManifestMergeManager: merges small manifests using greedy bin-packing,
grouping by partition_spec_id (manifests with different specs are never
merged). Oversized manifests pass through unchanged. ADDED entries from
prior manifests become EXISTING when merged (matching Java semantics).

Author: gty404

src/iceberg/CMakeLists.txt

@@ -45,8 +45,10 @@ set(ICEBERG_SOURCES
     location_provider.cc
     manifest/manifest_adapter.cc
     manifest/manifest_entry.cc
+    manifest/manifest_filter_manager.cc
     manifest/manifest_group.cc
     manifest/manifest_list.cc
+    manifest/manifest_merge_manager.cc
     manifest/manifest_reader.cc
     manifest/manifest_util.cc
     manifest/manifest_writer.cc