feat: jupnet order engine

[ioanSL]

Summary

Short summary of the change and impact.

Audit Status

• Required — Audit completed and artifacts attached
• Not Required — Justification below (3–5 lines)

If Required

• Audit report link:
• Scope:
• Key findings + fixes:

If Not Required (Justification)

Deployment Intent

• No deploy
• Deploy new program
• Upgrade existing program

[github-actions]

Coverage report

Filename	Lines Covered (%)	Functions Covered (%)
order-engine-sdk/src/fill.rs	95.62	88.57
order-engine-sdk/src/lib.rs	0	0
order-engine-sdk/src/transaction.rs	0	0
programs/jupnet-order-engine/src/error.rs	0	0
programs/jupnet-order-engine/src/lib.rs	0	0
programs/jupnet-order-engine/src/processor/fill.rs	0	0
programs/jupnet-order-engine/src/token_2022.rs	0	0
programs/order-engine/src/instructions/fill.rs	92.38	75
programs/order-engine/src/lib.rs	88.89	50
server-example/src/config.rs	0	0
server-example/src/server.rs	0	0
squads-sdk/src/accounts.rs	92.86	100
squads-sdk/src/config.rs	40.32	50
squads-sdk/src/error.rs	0	0
squads-sdk/src/lib.rs	100	100
squads-sdk/src/pda.rs	98	100
squads-sdk/src/serialize.rs	66.06	60
squads-sdk/src/settings.rs	93.02	100
squads-sdk/src/transaction.rs	44.09	44.44
squads-sdk/src/unwrap.rs	86.84	71.43
squads-sdk/src/wrap.rs	82.59	85
webhook-api/src/enums.rs	100	100
webhook-api/src/responses.rs	0	0