docs: quote pip install extras to fix zsh glob errors (#2815)

zsh interprets square brackets as glob patterns, so
`pip install hermes-agent[voice]` fails with 'no matches found'.
Quote all pip install commands with extras across 5 docs pages (12 instances).

Reported by OFumik0OP.

website/docs/getting-started/quickstart.md

@@ -139,7 +139,7 @@ hermes gateway setup    # Interactive platform configuration
 Want microphone input in the CLI or spoken replies in messaging?
 
 ```bash
-pip install hermes-agent[voice]
+pip install "hermes-agent[voice]"
 
 # Optional but recommended for free local speech-to-text
 pip install faster-whisper

website/docs/guides/use-voice-mode-with-hermes.md

@@ -57,19 +57,19 @@ If that is not solid yet, fix text mode first.
 ### CLI microphone + playback
 
 ```bash
-pip install hermes-agent[voice]
+pip install "hermes-agent[voice]"
 ```
 
 ### Messaging platforms
 
 ```bash
-pip install hermes-agent[messaging]
+pip install "hermes-agent[messaging]"
 ```
 
 ### Premium ElevenLabs TTS
 
 ```bash
-pip install hermes-agent[tts-premium]
+pip install "hermes-agent[tts-premium]"
 ```
 
 ### Local NeuTTS (optional)
@@ -81,7 +81,7 @@ python -m pip install -U neutts[all]
 ### Everything
 
 ```bash
-pip install hermes-agent[all]
+pip install "hermes-agent[all]"
 ```
 
 ## Step 3: install system dependencies

website/docs/reference/faq.md

@@ -348,7 +348,7 @@ Configure in `~/.hermes/config.yaml` under your gateway's settings. See the [Mes
 **Solution:**
 ```bash
 # Install messaging dependencies
-pip install hermes-agent[telegram]   # or [discord], [slack], [whatsapp]
+pip install "hermes-agent[telegram]"   # or [discord], [slack], [whatsapp]
 
 # Check for port conflicts
 lsof -i :8080

website/docs/user-guide/configuration.md

@@ -336,7 +336,7 @@ vLLM supports tool calling, structured output, and multi-modal models. Use `--en
 
 ```bash
 # Start SGLang server
-pip install sglang[all]
+pip install "sglang[all]"
 python -m sglang.launch_server \
   --model meta-llama/Llama-3.1-70B-Instruct \
   --port 8000 \
@@ -379,7 +379,7 @@ Download GGUF models from [Hugging Face](https://huggingface.co/models?library=g
 
 ```bash
 # Install and start
-pip install litellm[proxy]
+pip install "litellm[proxy]"
 litellm --model anthropic/claude-sonnet-4 --port 4000
 
 # Or with a config file for multiple models:

website/docs/user-guide/features/voice-mode.md

@@ -36,19 +36,19 @@ The `~/.hermes/` directory and default `config.yaml` are created automatically t
 
 ```bash
 # CLI voice mode (microphone + audio playback)
-pip install hermes-agent[voice]
+pip install "hermes-agent[voice]"
 
 # Discord + Telegram messaging (includes discord.py[voice] for VC support)
-pip install hermes-agent[messaging]
+pip install "hermes-agent[messaging]"
 
 # Premium TTS (ElevenLabs)
-pip install hermes-agent[tts-premium]
+pip install "hermes-agent[tts-premium]"
 
 # Local TTS (NeuTTS, optional)
 python -m pip install -U neutts[all]
 
 # Everything at once
-pip install hermes-agent[all]
+pip install "hermes-agent[all]"
 ```
 
 | Extra | Packages | Required For |