feat(core): add downloadPath config for custom file download location

[SamarthAP]

Summary

This PR adds a downloadPath configuration option to the Composio SDK, allowing users to specify a custom directory for downloaded files instead of the default $HOME/.composio/temp_files/ location.

Use Case

When running Composio in isolated environments (VMs, containers, sandboxes), the default download path may not be accessible or appropriate. This feature allows specifying a custom path that works for the specific deployment environment.

Changes

• Added downloadPath option to ComposioConfig interface
• Updated fileUtils.ts to accept custom download paths via saveFile() and downloadFileFromS3()
• Updated FileToolModifier.ts to pass through the custom download path
• Updated Tools.ts to propagate downloadPath to FileToolModifier

Usage

const composio = new Composio({
  apiKey: "your-api-key",
  downloadPath: "/custom/path/for/downloads"
});

Test Plan

• Verify default behavior unchanged when downloadPath not specified
• Verify files download to custom path when downloadPath is specified
• Verify path creation when custom directory doesn't exist

[vercel]

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[haxzie]

Thanks for the PR. Closing this for now, please start with an Issue before submiting a PR 🙌🏽