fix(python): update installation instruction to use correct package n…

…ame (#1508)

#### Summary
This PR updates the Python code generation template to correct the
package installation command. Previously, the generated comment
instructed users to install `baml`, but the correct package name is
`baml-py`.

#### Changes
- Updated `CONTENT_PREFIX` in `PythonLanguageFeatures` to use `pip
install baml-py` instead of `pip install baml`.

#### Why this is needed
- Ensures users install the correct Python package.
- Prevents potential confusion or installation errors.

#### Checklist
- [x] Code has been reviewed and tested.
- [x] All relevant documentation has been updated.
- [x] No breaking changes introduced.

<!-- ELLIPSIS_HIDDEN -->

----

> [!IMPORTANT]
> Corrects package installation command in comments to use `baml-py`
instead of `baml` across multiple files.
> 
>   - **Behavior**:
> - Corrects package installation command from `pip install baml` to
`pip install baml-py` in comments.
> - Affects `python_language_features.rs`, `__init__.py`, and
`async_client.py` among others.
>   - **Purpose**:
>     - Ensures correct package installation.
>     - Prevents user confusion and installation errors.
> 
> <sup>This description was created by </sup>[<img alt="Ellipsis"
src="https://img.shields.io/badge/Ellipsis-blue?color=175173">](https://www.ellipsis.dev?ref=BoundaryML%2Fbaml&utm_source=github&utm_medium=referral)<sup>
for 4dc0f95. It will automatically
update as commits are pushed.</sup>

<!-- ELLIPSIS_HIDDEN -->

engine/language_client_codegen/src/python/python_language_features.rs

@@ -10,7 +10,7 @@ impl LanguageFeatures for PythonLanguageFeatures {
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/__init__.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/async_client.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/globals.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/inlinedbaml.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/partial_types.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/sync_client.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/tracing.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/type_builder.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################
 

integ-tests/python/baml_client/types.py

@@ -2,7 +2,7 @@
 #
 #  Welcome to Baml! To use this generated code, please run the following:
 #
-#  $ pip install baml
+#  $ pip install baml-py
 #
 ###############################################################################