fix: curl import issue when parse the pair value

[ZxBing0066]

INS-1502
fixes #9163

Changes

Use slice to replace split to avoid string discard when multiple = in the data.

[Copilot]

Pull Request Overview

This PR fixes a bug in the cURL importer where strings containing multiple equals signs were incorrectly parsed. The fix replaces the split('=') approach with indexOf and slice to properly handle key-value pairs that have equals signs in their values.

• Replaced split('=') with indexOf and slice to preserve data after the first equals sign
• Updated logic to handle cases where no equals sign is present
• Added comprehensive test cases for various scenarios with multiple equals signs

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/insomnia/src/utils/importers/importers/curl.ts	Updated pair parsing logic to use slice instead of split for handling multiple equals signs
packages/insomnia/src/utils/importers/importers/curl.test.ts	Added test cases to verify correct parsing of data with multiple equals signs

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