Fix #52: Add Environment Variables to Disable Model Functionalities

[Josh-XT]

Resolves #52

The following modifications were applied:

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>insert</operation>
<target>def __init__(self):</target>
<content>
        # Check for environment variables to disable functionalities
        self.disable_llm = os.getenv("DISABLE_LLM", "false").lower() == "true"
        self.disable_vision_model = os.getenv("DISABLE_VISION_MODEL", "false").lower() == "true"
        self.disable_image_generation = os.getenv("DISABLE_IMAGE_GENERATION", "false").lower() == "true"
        self.disable_tts = os.getenv("DISABLE_TTS", "false").lower() == "true"
        self.disable_stt = os.getenv("DISABLE_STT", "false").lower() == "true"
</content>
</modification>

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>replace</operation>
<target>if self.current_llm.lower() != "none":</target>
<content>if self.current_llm.lower() != "none" and not self.disable_llm:</content>
</modification>

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>replace</operation>
<target>if getenv("EMBEDDING_ENABLED").lower() == "true":</target>
<content>if getenv("EMBEDDING_ENABLED").lower() == "true" and not self.disable_llm:</content>
</modification>

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>replace</operation>
<target>if self.current_vlm != "":</target>
<content>if self.current_vlm != "" and not self.disable_vision_model:</content>
</modification>

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>replace</operation>
<target>if getenv("TTS_ENABLED").lower() == "true":</target>
<content>if getenv("TTS_ENABLED").lower() == "true" and not self.disable_tts:</content>
</modification>

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>replace</operation>
<target>if getenv("STT_ENABLED").lower() == "true":</target>
<content>if getenv("STT_ENABLED").lower() == "true" and not self.disable_stt:</content>
</modification>

<modification>
<file>ezlocalai/Pipes.py</file>
<operation>replace</operation>
<target>if img_import_success:</target>
<content>if img_import_success and not self.disable_image_generation:</content>
</modification>

[Josh-XT]

The pull request #53 for issue #52 in the ezLocalai repository is well-implemented. It introduces environment variables to conditionally disable various model functionalities, effectively resolving the issue. The modifications are correctly applied, align with project patterns and standards, and do not pose security or performance concerns. No further changes are necessary. Well done on this implementation!