Add guides to the Symbiosis Swidge documentation

[alexn-ops]

Adds a USDT0/Orchestra-style Guides section to the Symbiosis Swidge module documentation and updates the section to the released @symbiosis-finance/wdk-protocol-swidge-symbiosis@1.3.0, on top of the Symbiosis pages from tetherto#212 (branch pr212-base mirrors ihsraham:feat/release-docs-2026-07-27).

Changes

• New guides:
  • Get Started — install, source account, provider construction, discovery, quote-only use.
  • Quote and Execute — exact-input options, indicative quotes, review checklist, EVM execution with the allowance-reset flow, fee caps.
  • Bridge from Bitcoin — deposit-address routes, refund address, swap-endpoint rate limit.
  • Track Settlement — durable operation IDs, polling with a deadline, status mapping, refunds.
  • Handle Errors — typed error family, pre-write vs post-write failures, safe retries, account disposal.
• Sidebar: a Guides group under the Symbiosis folder in custom-tree.ts; a Get Started card on the module overview.
• Release 1.3.0 (tag, npm) across the four existing pages, the module catalogs, and the guides: TON, Tron and Solana source routes execute when the bound wallet account supports the required transaction format, probed at execution time (raw BoC bodies for single-message TON routes, contract calls plus TRC-20 approvals for Tron with receipt-failure detection, serialized transactions for Solana); wallet versions without the capability stay quote-only with UnsupportedRouteError.
• USDT terminology aligned across the section; link to the repository's runnable examples/swidge.js.

Every guide carries the community responsibility disclaimer and docType/schemaType frontmatter. Guide content was fact-checked against the module source (v1.3.0 tag) — behavior claims, error classes and fields, status mapping, snippet APIs.

Validation

• check:meta, check:redirects, check:links (internal + anchors): 302 MDX files, 0 errors.
• Full static build and llms.txt/llms-full.txt regeneration not run locally (no GitHub Packages access for @tetherto/docs-seo-*); to be regenerated before proposing upstream.