feat: enable chunking for SFX WASM builds

[GordonSmith]

Checklist:

• The commit message is properly formatted and free of typos.
  • The commit message title makes sense in a changelog, by itself.
  • The commit message includes a "fixes" reference if appropriate.
  • The commit is signed.
• The change has been fully tested:
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• There are no similar instances of the same problem that should be addressed
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Testing:

[Copilot]

Pull request overview

This PR enables chunked processing for SFX (Self-Extracting) WASM builds to handle large WASM files more efficiently. The key improvement is the introduction of chunked encoding and compression instead of processing entire files in memory at once.

• Implements chunked processing for Base91 encoding and Zstd compression (64MB chunks)
• Optimizes the Base91 decode function with pre-allocated output buffers and lookup tables
• Updates dependencies to support chunked APIs (@hpcc-js/wasm-base91 1.10.0, @hpcc-js/wasm-zstd 1.9.0)

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 3 comments.

File	Description
packages/esbuild-plugins/src/sfx-wrapper.ts	Core implementation: adds chunked encoding/compression logic, optimizes decode function with pre-allocated buffers and lookup tables, updates imports to use node: prefix, adds singleton pattern for Base91/Zstd instances
packages/esbuild-plugins/package.json	Updates @hpcc-js/wasm-base91 to 1.10.0 and @hpcc-js/wasm-zstd to 1.9.0 to support chunked APIs; updates esbuild from 0.27.0 to 0.27.2; adds update-major script
package-lock.json	Reflects dependency updates including esbuild 0.27.2 and all platform-specific binaries, wasm library updates, and transitive dependency updates (js-yaml, mdast-util-to-hast)

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