docs: remove order-based swap flow (keep atomic + LSPS1)

[bitwalt]

The maker API's order-based swap endpoints (/api/v1/swaps/orders/*) have been retired — they now 404 on the live service. This removes the corresponding documentation and aligns the SDK/CLI docs with kaleido-sdk 0.1.12 (kaleido-sdk#33) and kaleido-cli 0.1.1 (kaleido-cli#20).

Changed

• API Reference — dropped the order-flow sections and the SwapOrderStatus state machine from swap-protocol / swap-apis; fixed the atomic status path to POST /api/v1/swaps/atomic/status (was mislabeled GET /swaps/status); pruned openapi.json (swaps/orders paths + SwapOrder*/OrderHistory*/OrderStats*/RateDecision* schemas).
• SDK — removed createSwapOrder/waitForSwapCompletion/etc. and the SwapOrder* types from api-reference, types, examples, how-to-swap, error-handling, websocket; added the v0.1.12 changelog entry.
• CLI — removed the swap order tables/examples from market-and-swaps and command-reference.
• Overview — removed the SwapOrderStatus glossary entry; fixed the API routing table and the "swap stuck" troubleshooting bullet.

Kept (unrelated)

• Atomic swap docs, and all LSPS1 channel order docs (create_order/get_order, channel order …, rgb-lsps1-apis).

Verification

• No residual swaps/orders / SwapOrderStatus / swap order references (except the extension's own internal swap-status label, which is unrelated).
• No broken internal links; openapi.json is valid JSON.

Stacked on #23 (base docs/accuracy-sweep) to stay conflict-free, since #23 also edits these files. Retarget to main once #23 merges.

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