Merge branch 'ps/cat-file-remote-object-info' into seen

The 'remote-object-info' command has been added to 'git cat-file --batch-command', allowing clients to request object metadata (currently size) from a remote server via protocol v2 without downloading the entire object. Format placeholders are dynamically filtered on the client based on server-advertised capabilities, returning empty strings for inapplicable or unsupported fields. * ps/cat-file-remote-object-info: cat-file: make remote-object-info allow-list adapt to the server cat-file: add remote-object-info to batch-command transport: add client support for object-info serve: advertise object-info feature protocol-caps: check object existence regardless of the attributes requested fetch-pack: move fetch initialization connect: make write_fetch_command_and_capabilities() more generic fetch-pack: move write_fetch_command_and_capabilities() to connect.c fetch-pack: use unsigned int for hash_algo variable fetch-pack: drop the static advertise_sid variable t1006: extract helper functions into new 'lib-cat-file.sh' cat-file: declare loop counter inside for() transport-helper: fix memory leak of helper on disconnect