feat: add --descendant and --ancestor flags to verdi node list

[Khushi281300]

PR Description

Overview

This PR introduces the --descendant and --ancestor flags to verdi node list, addressing issue #6782. These options allow users to explore the provenance graph directly from the CLI by filtering nodes based on their relationships.

What’s Included

• New CLI Options
  Added DESCENDANT and ANCESTOR options in src/aiida/cmdline/params/options/main.py using NodeParamType.

• Enhanced Query Logic
  Refactored the node_list command in src/aiida/cmdline/commands/cmd_node.py to use a custom QueryBuilder.
  This enables:

  • with_ancestors
  • with_descendants
    with explicit tagging (tag='node') to ensure correct filtering.

• Backward Compatibility
  All existing features (sorting, projections, limits, and entry-point filters) remain unchanged.

Testing & Verification

1. Unit Tests
Added tests/cmdline/commands/test_node_list_relationship.py with test cases for:

• Ancestor filtering
• Descendant filtering
• Combined usage

Result:
3 passed

---

2. Manual Verification
Tested on a local SQLite profile using a simple provenance chain:

Data (PK 3) → CalcJobNode (PK 4)

• verdi node list --ancestor 3 → returns node 4
• verdi node list --descendant 4 → returns node 3

---

3. Regression Check
Executed tests/cmdline/commands/test_node.py to ensure no regressions.

• Observed some pre-existing failures on Windows (related to graphviz and prompt formatting), which are unrelated to this PR.

---