[Docs] add docs of base64 or local file mm inputs

[ApplEOFDiscord]

Motivation

• Add docs of passing mm inputs by base64-encoded str or local path

Modifications

• Docs of eb45vl and eb45vl-thinking

Usage or Command

none

Accuracy Tests

none

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (develop@0937918). Learn more about missing BASE report.

Additional details and impacted files

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  Files              ?      317           
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  Hits               ?    22765           
  Misses             ?    14107           
  Partials           ?     1811           

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