chore: upgrade go v1.26

[hgiasac]

This pull request introduces several improvements and refactors across the connector generation and schema parsing codebase, focusing on code readability, efficiency, and modernization. The most notable changes include replacing custom pointer functions with Go's built-in new, refactoring string building for performance, updating dependencies to Go 1.26, and improving error formatting and type parsing.

Modernization and Dependency Updates

• Updated the Go version in Dockerfile.tmpl and go.mod.tmpl from 1.25/1.24.12 to 1.26/1.26.1, ensuring compatibility with the latest language features and ecosystem improvements. [1] [2]

Code Generation and Schema Template Improvements

• Replaced the custom toPtr function with the built-in new for pointer creation in schema templates and testdata, simplifying code and leveraging standard library functionality. [1] [2] [3] [4] [5] [6] [7] [8]

String Building and Parsing Refactors

• Refactored various string concatenations to use strings.Builder for improved performance and readability, particularly in type name generation and argument formatting. [1] [2] [3]
• Introduced strings.SplitSeq for splitting enum and type parameter strings, and updated loops to iterate over the resulting sequence, enhancing parsing robustness. [1] [2]

Error Handling and Formatting

• Improved error formatting for unsupported types and parameter validation, using multi-line fmt.Errorf for clearer error messages. [1] [2] [3]

Code Clean-up and Utility Usage

• Replaced manual map copying with maps.Copy for flattening embedded object fields, streamlining struct parsing and reducing boilerplate.
• Minor refactors for readability, such as splitting long lines, consistent formatting, and updating function calls to use variadic arguments. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

These changes collectively enhance maintainability, performance, and code clarity throughout the connector generation and schema parsing modules.

[github-actions]

Package	Line Rate	Health
github.com/hasura/ndc-codegen-example	98%	✔
github.com/hasura/ndc-codegen-example/functions	63%	➖
github.com/hasura/ndc-codegen-example/types/arguments	43%	➖
github.com/hasura/ndc-codegen-example/types	33%	❌
github.com/hasura/ndc-sdk-go/v2/cmd/hasura-ndc-go/command/internal	84%	✔
github.com/hasura/ndc-sdk-go/v2/cmd/hasura-ndc-go/command	46%	➖
github.com/hasura/ndc-sdk-go/v2/cmd/hasura-ndc-go/version	62%	➖
github.com/hasura/ndc-sdk-go/v2/connector	67%	➖
github.com/hasura/ndc-sdk-go/v2/credentials	75%	✔
github.com/hasura/ndc-sdk-go/v2/example/reference	54%	➖
github.com/hasura/ndc-sdk-go/v2/ndctest	68%	➖
github.com/hasura/ndc-sdk-go/v2/scalar	90%	✔
github.com/hasura/ndc-sdk-go/v2/schema	23%	❌
github.com/hasura/ndc-sdk-go/v2/utils/compression	67%	➖
github.com/hasura/ndc-sdk-go/v2/utils	53%	➖
Summary	47% (12445 / 26712)	➖

Minimum allowed line rate is 40%