[FEATURE] Bond/Team device support

[cachebag]

Is your feature request related to a problem? Please describe.
Link aggregation (bonding/teaming) is not supported. Users cannot combine multiple physical interfaces for redundancy or increased bandwidth.

Describe the solution you'd like
Add support for creating bond and team devices that aggregate multiple slave interfaces with configurable modes (active-backup, 802.3ad, etc.).

For Developers- what would your solution be?

• Add NMBond and NMTeam proxy traits in proxies.rs for respective device interfaces
• Create bond_builders.rs and team_builders.rs with connection builder functions
• Add bond.rs and team.rs modules with create_bond(), add_slave(), set_mode() functions
• Expose bond/team operations in NetworkManager public API
• Update DeviceType enum (Bond type code: 7, Team type code: 18)

Additional context