Fix: message.content as Array isn't compatible with some provider

[cexer]

Description

Some providers do not recognize content of the form content: [{xxx}, {xxx}], for example:

• ByteDance Volcano Engine https://www.volcengine.com/
• Baidu Intelligent Cloud https://cloud.baidu.com

Related issue #769，related discussion #839
This PR fix content being an array by splitting it into multiple string messages.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

1. Apply a deepseek configuration to the roo code with APIKEY and model id from ByteDance Volcano Engine (https://console.volcengine.com/ark/region:ark+cn-beijing/openManagement)
2. Select Volcano Engine's deepseek in the roo code and test Ask, the model can respond normally. Before this fix, it will response "One or more parameters invalid ...".
3. Also tested other providers + models, including Chat/Image Input model, all ok.

Checklist:

• My code follows the patterns of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation

Additional context

Related Issues

Reviewers

[changeset-bot]

🦋 Changeset detected

Latest commit: b002a2e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
roo-cline	Patch

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[mrubens]

Hi @cexer, I made some changes to support the Ark provider here: #886. Does that help at all with this PR?