Correct wallet and pricing documentation examples

[ihsraham]

Correct older examples and clarify existing contracts separately from the published release updates in #281.

• Restore corrected wallet transfer, Lightning payment, TronWeb and exact-output swap examples; retain accurate token units and distinguish quotes from settlement.
• Explain raw seed inputs for BIP-32 and SLIP-0010 derivation and repair repeated argument descriptions, guide links and Solana Gasless error guidance, including its cleanup-section link.
• Replace expired pricing-history ranges, distinguish Bitfinex ts from declared timestamp, handle nullable price data and correct failover/retry descriptions.

This draft is stacked on #281, rebased onto its updated head 5a51e72a. Review only the 31-file correction diff (30 documentation pages and their generated feed) against that branch; merge #281 first, then rebase and retarget this PR to develop. The original signed correction commit and author are preserved; #260’s gas-option migration remains in the base. It adds no release records or package-version updates.

Validation on rebased head 70451811: clean Node 22.22.2 npm ci, LINK_CHECK_EXTERNAL=false npm run quality, and LINK_CHECK_EXTERNAL=true npm run check:links pass, with zero broken links. All 387 source routes match generated LLM, search and Markdown output; all 30 corrected routes return HTTP 200, and the cleanup link reaches the rendered disposal heading. Independent scope review passes 81 checks; source/runtime/type probes and all 16 modified runnable JavaScript fences pass. Competing-asset tests and authored/build review pass. Pricing probes use mocked HTTP; no live transactions or native-device flows were exercised. The PR remains draft, so its hosted quality job is skipped.

[kinsta]

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