feat: add additional logging to llama stack build (#1689)

# What does this PR do?
Partial revert of fa68ded07c

this commit ensures users know where their new templates are generated
and how to run the newly built distro locally

discussion on Discord:
1351652390

## Test Plan
Did a local run - let me know if we want any unit testing covering this

![Screenshot from 2025-03-18
22-38-18](https://github.com/user-attachments/assets/6d5dac52-edad-4a84-992f-a3c23cda10c8)

## Documentation
Updated "Zero to Hero" guide with new output

---------

Signed-off-by: Nathan Weinberg <nweinber@redhat.com>

docs/zero_to_hero_guide/README.md

@@ -86,11 +86,11 @@ If you're looking for more specific topics, we have a [Zero to Hero Guide](#next
    llama stack build --template ollama --image-type conda
    ```
    **Expected Output:**
-   ```
+   ```bash
    ...
-   Build Successful! Next steps:
-   1. Set the environment variables: LLAMA_STACK_PORT, OLLAMA_URL, INFERENCE_MODEL, SAFETY_MODEL
-   2. `llama stack run /Users/<username>/.llama/distributions/llamastack-ollama/ollama-run.yaml
+   Build Successful!
+   You can find the newly-built template here: ~/.llama/distributions/ollama/ollama-run.yaml
+   You can run the new Llama Stack Distro via: llama stack run ~/.llama/distributions/ollama/ollama-run.yaml --image-type conda
    ```
 
 3. **Set the ENV variables by exporting them to the terminal**:

llama_stack/cli/stack/_build.py

@@ -19,7 +19,7 @@ import yaml
 from prompt_toolkit import prompt
 from prompt_toolkit.completion import WordCompleter
 from prompt_toolkit.validation import Validator
-from termcolor import cprint
+from termcolor import colored, cprint
 
 from llama_stack.cli.stack.utils import ImageType
 from llama_stack.cli.table import print_table
@@ -389,6 +389,11 @@ def _run_stack_build_command_from_build_config(
             shutil.copy(path, run_config_file)
 
         cprint("Build Successful!", color="green")
+        cprint("You can find the newly-built template here: " + colored(template_path, "light_blue"))
+        cprint(
+            "You can run the new Llama Stack distro via: "
+            + colored(f"llama stack run {template_path} --image-type {build_config.image_type}", "light_blue")
+        )
         return template_path
     else:
         return _generate_run_config(build_config, build_dir, image_name)