feat: add prompt-format list (#1222)

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


https://github.com/meta-llama/llama-stack/blob/19ae4b35d9d22841ca14f30166d4b317554bd28d/llama_stack/cli/model/prompt_format.py#L47

Based on the comment: `Only Llama 3.1 and 3.2 are supported`, even 3.1,
3.2 are not all models can show it with `prompt-format`, so cannot refer
to `llama model list`,
only refer to list when enter a invalid model, so it would be nice to
help to check the valid models:
```
 llama model prompt-format -m Llama3.1-405B-Instruct:bf16-mp8
usage: llama model prompt-format [-h] [-m MODEL_NAME] [-l]
llama model prompt-format: error: Llama3.1-405B-Instruct:bf16-mp8 is not a valid Model <<<<---. Choose one from --
Llama3.1-8B
Llama3.1-70B
Llama3.1-405B
Llama3.1-8B-Instruct
Llama3.1-70B-Instruct
Llama3.1-405B-Instruct
Llama3.2-1B
Llama3.2-3B
Llama3.2-1B-Instruct
Llama3.2-3B-Instruct
Llama3.2-11B-Vision
Llama3.2-90B-Vision
Llama3.2-11B-Vision-Instruct
Llama3.2-90B-Vision-Instruct

before:
$ llama model prompt-format --help
usage: llama model prompt-format [-h] [-m MODEL_NAME]

Show llama model message formats

options:
  -h, --help            show this help message and exit
  -m MODEL_NAME, --model-name MODEL_NAME
                        Model Family (llama3_1, llama3_X, etc.)

Example:
    llama model prompt-format <options>


after:
$ llama model prompt-format --help
usage: llama model prompt-format [-h] [-m MODEL_NAME] [-l]

Show llama model message formats

options:
  -h, --help            show this help message and exit
  -m MODEL_NAME, --model-name MODEL_NAME
                        Model Family (llama3_1, llama3_X, etc.)
  -l, --list            List the valid supported models

Example:
    llama model prompt-format <options>

$ llama model prompt-format -l
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Model                        ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ Llama3.1-8B                  │
├──────────────────────────────┤
│ Llama3.1-70B                 │
├──────────────────────────────┤
│ Llama3.1-405B                │
├──────────────────────────────┤
│ Llama3.1-8B-Instruct         │
├──────────────────────────────┤
│ Llama3.1-70B-Instruct        │
├──────────────────────────────┤
│ Llama3.1-405B-Instruct       │
├──────────────────────────────┤
│ Llama3.2-1B                  │
├──────────────────────────────┤
│ Llama3.2-3B                  │
├──────────────────────────────┤
│ Llama3.2-1B-Instruct         │
├──────────────────────────────┤
│ Llama3.2-3B-Instruct         │
├──────────────────────────────┤
│ Llama3.2-11B-Vision          │
├──────────────────────────────┤
│ Llama3.2-90B-Vision          │
├──────────────────────────────┤
│ Llama3.2-11B-Vision-Instruct │
├──────────────────────────────┤
│ Llama3.2-90B-Vision-Instruct │
└──────────────────────────────┘
```

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## 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.*]

[//]: # (## Documentation)

---------

Signed-off-by: reidliu <reid201711@gmail.com>
Co-authored-by: reidliu <reid201711@gmail.com>

Author: reidliu41

llama_stack/cli/model/prompt_format.py

@@ -9,6 +9,7 @@
 from io import StringIO
 
 from llama_stack.cli.subcommand import Subcommand
+from llama_stack.cli.table import print_table
 from llama_stack.models.llama.datatypes import CoreModelId, ModelFamily, is_multimodal, model_family
 
 
@@ -48,7 +49,26 @@ def _run_model_template_cmd(self, args: argparse.Namespace) -> None:
         supported_model_ids = [
             m for m in CoreModelId if model_family(m) in {ModelFamily.llama3_1, ModelFamily.llama3_2}
         ]
-        model_str = "\n".join([m.value for m in supported_model_ids])
+
+        model_list = [m.value for m in supported_model_ids]
+        model_str = "\n".join(model_list)
+
+        if args.list:
+            headers = ["Model(s)"]
+            rows = []
+            for m in model_list:
+                rows.append(
+                    [
+                        m,
+                    ]
+                )
+            print_table(
+                rows,
+                headers,
+                separate_rows=True,
+            )
+            return
+
         try:
             model_id = CoreModelId(args.model_name)
         except ValueError: