Add standard cross-links from JS tutorials to the js-stellar-sdk docs site

[oceans404]

Context

The JS SDK now has its own docs site with task guides and a full reference: https://stellar.github.io/js-stellar-sdk/. It is the source of truth for how to use the SDK, versioned with the code and updated in the same PRs. A full audit of stellar-docs found ~35 pages whose JS content overlaps SDK docs pages. Most of these pages should keep their content (they carry protocol context and multi-language tabs) and gain a consistent pointer to the SDK docs page that owns the JS mechanics.

This also future-proofs the docs: SDK v17 will ship a breaking XDR rewrite, and every page that links to the SDK docs instead of restating them is a page that does not need a v17 rewrite.

What to do

1. Create a small reusable component or standard admonition for these callouts, for example <SdkDocsLink page="guides/02-send-a-payment" /> rendering something like: "For the complete JS SDK reference for this task, see the JS SDK docs." A single component makes future link maintenance a one-file change and the usages grep-able.
2. Apply it to the pages below, next to the JS tab or the first JS snippet.

Mapping (SDK docs page -> stellar-docs pages to link from)

Guide 01-connect-and-fund: docs/tokens/quickstart.mdx, docs/build/apps/example-application-tutorial/overview.mdx, docs/build/guides/dapps/frontend-guide.mdx, docs/build/guides/transactions/create-account.mdx

Guide 02-send-a-payment: docs/build/apps/example-application-tutorial/payment.mdx, docs/build/guides/transactions/send-and-receive-payments.mdx, docs/tools/openzeppelin-relayer.mdx

Guide 03-issue-an-asset: docs/tokens/quickstart.mdx, docs/tokens/how-to-issue-an-asset.mdx, docs/tokens/control-asset-access.mdx, docs/build/guides/conventions/deploy-sac-with-code.mdx

Guide 04-query-and-stream: docs/build/apps/example-application-tutorial/querying-data.mdx, docs/data/apis/horizon/api-reference/structure/pagination/README.mdx, docs/data/apis/horizon/api-reference/structure/pagination/page-arguments.mdx, docs/build/guides/events/ingest.mdx, docs/learn/fundamentals/stellar-data-structures/events.mdx, docs/learn/fundamentals/liquidity-on-stellar-sdex-liquidity-pools.mdx

Guide 05-handle-errors: docs/data/apis/horizon/api-reference/errors/error-handling.mdx, docs/build/guides/transactions/submit-transaction-wait-js.mdx

Guide 06-invoke-a-contract: docs/build/guides/transactions/invoke-contract-tx-sdk.mdx (the JS tab mirrors this guide almost exactly), docs/learn/fundamentals/contract-development/contract-interactions/stellar-transaction.mdx, docs/build/guides/transactions/install-deploy-contract-with-code.mdx, docs/build/guides/transactions/upload-wasm-bytecode.mdx

Guide 07-contract-auth: docs/build/guides/transactions/signing-soroban-invocations.mdx, docs/learn/fundamentals/contract-development/contract-interactions/transaction-simulation.mdx, docs/build/guides/freighter/sign-auth-entries.mdx, docs/build/apps/guestbook/setup-passkeys.mdx

Reference contracts-bindings / contracts-client: docs/learn/fundamentals/contract-development/types/fully-typed-contracts.mdx (also mention npx @stellar/stellar-sdk generate alongside the Stellar CLI flow), docs/build/apps/guestbook/bindings.mdx, docs/build/apps/dapp-frontend.mdx

Reference core-xdr: docs/learn/fundamentals/data-format/xdr.mdx, docs/build/guides/rpc/retrieve-contract-code-js.mdx

Reference core-soroban-primitives: docs/build/guides/conversions/address-conversions.mdx, docs/build/guides/conversions/bytes-conversions.mdx, docs/build/guides/conversions/scval-conversions.mdx, docs/build/guides/conversions/string-conversions.mdx

Reference network-rpc: docs/data/apis/rpc/api-reference/methods/getTransaction.mdx, docs/data/apis/rpc/api-reference/methods/sendTransaction.mdx, docs/data/apis/rpc/api-reference/methods/getLedgerEntries.mdx, docs/data/apis/rpc/api-reference/structure/json-rpc.mdx (currently links only the GitHub repo), docs/build/guides/archival/restore-data-js.mdx, docs/build/guides/archival/create-restoration-footprint-js.mdx, docs/build/guides/conventions/extending-wasm-ttl.mdx, docs/build/guides/transactions/simulateTransaction-Deep-Dive.mdx

Reference network-horizon: docs/build/guides/transactions/path-payments.mdx, docs/build/guides/basics/verify-trustlines.mdx

Reference seps-toml / seps-webauth: docs/build/apps/example-application-tutorial/anchor-integration/sep1.mdx, docs/build/apps/example-application-tutorial/anchor-integration/sep10.mdx

Reference core-transactions: docs/build/guides/transactions/fee-bump-transactions.mdx, docs/build/guides/transactions/sponsored-reserves.mdx, docs/build/guides/transactions/claimable-balances.mdx, docs/build/guides/transactions/clawbacks.mdx, docs/build/guides/transactions/channel-accounts.mdx, docs/build/guides/transactions/pooled-accounts-muxed-accounts-memos.mdx

Suggested execution

Split into a few PRs by section (build/guides, build/apps, learn+tokens, data). The component lands in the first PR.

Acceptance criteria

• A single reusable component (or documented admonition pattern) exists for SDK docs callouts.
• All pages listed above include a callout linking to the mapped SDK docs page, and all links resolve.