fix: fix the describe table display issue

[reidliu41]

What does this PR do?

[Provide a short summary of what this PR does and why. Link to relevant issues if applicable.]

If not passed the headers, it will display empty for the first row, also might break the second row, make the Model row as headers.

Before:
$ llama model describe -m Llama3.1-70B
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃                             ┃                                ┃ <<<---------
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ Model             │ Llama3.1-70B         │   <<<---------
├─────────────────────────────┼────────────────────────────────┤
│ Hugging Face ID             │ meta-llama/Llama-3.1-70B       │
├─────────────────────────────┼────────────────────────────────┤
│ Description                 │ Llama 3.1 70b model            │
├─────────────────────────────┼────────────────────────────────┤
......

after:
$ llama model describe -m Llama3.1-70B
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Model                       ┃ Llama3.1-70B                   ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ Hugging Face ID             │ meta-llama/Llama-3.1-70B       │
├─────────────────────────────┼────────────────────────────────┤
│ Description                 │ Llama 3.1 70b model            │
├─────────────────────────────┼────────────────────────────────┤
......

Test Plan

[Describe the tests you ran to verify your changes with result summaries. Provide clear instructions so the plan can be easily re-executed.]

[leseb]

Why is this gone?

[reidliu41]

colored is used for model before, and the header has style by default, so no need to use colored, please correct me if I am understanding.