Implement S3 generics for network functions

[Copilot]

Description

Completes the S3 generic dispatch pattern for all manipulation and modification functions.

New .default methods

• to_eulerian.default() — the last to_* function missing a fallback
• from_subgraphs.default(), from_egos.default(), from_waves.default(), from_slices.default(), from_ties.default() — delegate to .list methods

New manipulation functions

• arrange_nodes() / arrange_changes() — reorder nodes/changes by attribute
• rename_changes() / rename_info() — rename columns
• filter_info() / select_info() — subset network information attributes

Bug fixes

• Fixed as_input() argument order in bind_nodes.default(), filter_nodes.default(), join_nodes.default() — FUN was passed positionally where .data was expected

NAMESPACE & docs

• Registered all new S3 methods and exports
• Updated manip_nodes_num.Rd, manip_changes.Rd, manip_info.Rd

Checklist:

• Documentation
  • DESCRIPTION file version is bumped by the appropriate increment (major, minor, patch)
  • Date in DESCRIPTION is correct
  • Longer functions are commented inline or broken down into helper functions to help debugging
• PR form
  • Title indicates expected version number
  • PR description above and the NEWS.md file are aligned
  • Description above itemizes changes under subsection titles, e.g. "## Data""
  • Closed, fixed, or related issues are referenced and explained in the description above, e.g. "Fixed #0 by adding A"