fix: preserve string return type for scSpecTypeAddress

[Ryang-21]

What

This fixes an oversight in binding generation that allows the xdr.ScSpecType.scSpecTypeAddress() to be parsed universally into its typescript representation of string | Address This is not backwards compatible with the CLI's generated implementation for function return types and generated interfaces that contain Address.

[Copilot]

Pull request overview

This PR fixes a type generation issue for scSpecTypeAddress to maintain backwards compatibility. The binding generator now differentiates between function inputs (which can accept string | Address) and outputs/return types (which return string).

Changes:

• Modified parseTypeFromTypeDef to accept an isFunctionInput parameter that controls whether Address types are typed as string | Address (for inputs) or string (for outputs)
• Updated tests to separately verify input and output type expectations for all primitive types
• Applied the input flag to all function parameters and constructor parameters in the client generator

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
test/integration/bindings.test.ts	Updated tests to verify both input and output type mappings separately, with address inputs expecting string | Address and outputs expecting string
src/bindings/utils.ts	Added isFunctionInput parameter to parseTypeFromTypeDef and propagated it through nested types, with Address/MuxedAddress returning string | Address only for inputs
src/bindings/client.ts	Marked function and constructor input parameters with isFunctionInput=true to generate the appropriate union type

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[github-actions]

Size Change: +19.5 kB (+0.04%)

Total Size: 45 MB

Filename	Size	Change
dist/stellar-sdk-minimal.js	5.95 MB	+3.3 kB (+0.06%)
dist/stellar-sdk-minimal.min.js	5.06 MB	+1.58 kB (+0.03%)
dist/stellar-sdk-no-axios.js	5.95 MB	+3.3 kB (+0.06%)
dist/stellar-sdk-no-axios.min.js	5.06 MB	+1.59 kB (+0.03%)
dist/stellar-sdk-no-eventsource.js	6.2 MB	+3.29 kB (+0.05%)
dist/stellar-sdk-no-eventsource.min.js	5.27 MB	+1.58 kB (+0.03%)
dist/stellar-sdk.js	6.2 MB	+3.29 kB (+0.05%)
dist/stellar-sdk.min.js	5.27 MB	+1.59 kB (+0.03%)

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