Reflect stellar-base fold-in (SDK v16): stop pointing readers at js-stellar-base and js-soroban-client

[oceans404]

Context

As of @stellar/stellar-sdk v16, @stellar/stellar-base is folded into the SDK and re-exported from the top level. The SDK is the only package developers need (see migration notes). Several stellar-docs pages still treat stellar-base (or the long-retired js-soroban-client) as a separate library. Each item below lists the exact location and the fix.

Checklist

1. docs/learn/fundamentals/data-format/xdr.mdx: repoint XDR type references

• Line 61: links js-stellar-base/blob/master/types/curr.d.ts and calls it "your primary guide to navigating the XDR if you're using JavaScript". Repoint to the SDK XDR reference: https://stellar.github.io/js-stellar-sdk/reference/core-xdr/
• Line 119: another js-stellar-base curr.d.ts deep link for ScAddress. Same fix.
• Line 144 and line 186: link to old jsdoc pages (js-stellar-base_src_scval.js.html, js-stellar-base_src_events.js.html) on the SDK docs site. Verify these URLs still resolve on the current site; replace with current API doc links for scValToNative and humanizeEvents.

2. docs/networks/software-versions.mdx: drop the separate "JS Stellar Base" row going forward

• Lines 32-33 (Protocol 27 table): Stellar JS Stellar Base | TBD next to Stellar JS Stellar SDK | v16.0.0-rc.2. For Protocol 27 and future tables, remove the JS Stellar Base row or annotate it "folded into stellar-sdk as of v16". Leave historical protocol tables unchanged.

3. docs/build/guides/freighter/sign-auth-entries.mdx: repoint auth helper links

• Line 7: authorizeEntry link goes to js-stellar-base/.../src/auth.js. Repoint to the SDK docs (https://stellar.github.io/js-stellar-sdk/guides/07-contract-auth/ or js-stellar-sdk repo source).
• Line 9: HashIdPreimageSorobanAuthorization link goes to js-stellar-base/.../types/next.d.ts. Same fix.

4. docs/build/guides/archival/restore-contract-js.mdx: retire js-soroban-client links

• Line 16 and line 18: both link to stellar.github.io/js-soroban-client/... (retired site). Repoint Contract.getFootprint() and Server.prepareTransaction() to https://stellar.github.io/js-stellar-sdk/reference/network-rpc/

5. docs/build/guides/dapps/frontend-guide.mdx: fix unscoped install

• Line 93: npm install stellar-sdk @stellar/freighter-api bignumber.js uses the deprecated unscoped package. Change to @stellar/stellar-sdk. This is the only unscoped install left in the repo.

6. docs/data/apis/rpc/api-reference/methods/getLedgerEntries.mdx: repoint type definition link

• Line 426: links js-stellar-base/.../types/curr.d.ts for entry accessor methods. Repoint to https://stellar.github.io/js-stellar-sdk/reference/core-xdr/

7. docs/data/analytics/hubble/developer-guide/backfill/JS-UDF.mdx: rewrite around the SDK bundle

• This page's premise is stale: it instructs users to clone and build js-stellar-base standalone (line 16, lines 24-41, GCS path on line 68) to get stellar-base.min.js for BigQuery UDFs. Rewrite to build or download the @stellar/stellar-sdk browser bundle instead, and update the StellarBase.* globals in the UDF code accordingly. The BigQuery-specific guidance stays.

Acceptance criteria

• rg 'js-stellar-base|js-soroban-client' docs/ --glob '!i18n/**' returns no hits outside intentionally historical content.
• Protocol 27+ software version tables no longer imply stellar-base ships separately.