feat: add CLI commands for browsing OpenML flows, datasets, and tasks (#1486)

[KanishqGandharv219]

Closes #1486

This PR adds CLI commands for browsing three OpenML resource types:

Flows:

• openml flows list — list flows with --size, --offset, --tag, --uploader filters
• openml flows info <id> — display detailed flow information

Datasets:

• openml datasets list — list datasets with --size, --offset, --tag, --status, --data-name filters
• openml datasets info <id> — display detailed dataset information

Tasks:

• openml tasks list — list tasks with --size, --offset, --tag, --task-type filters
• openml tasks info <id> — display detailed task information

All commands include corresponding tests. Running openml <resource> without a subcommand prints help text.

[KanishqGandharv219]

Update: I noticed there were previous stale PRs for this feature from Late 2025. To make this PR fully comprehensive, I've extended it to include the openml datasets list and openml datasets info CLI commands as well, which was requested by maintainers in prior reviews. All tests pass!

[KanishqGandharv219]

Update: I've expanded the scope to include Tasks as well. The PR now provides list and info commands for Flows, Datasets, and Tasks, effectively addressing the full range of resources requested in #1486.