docs: remove hermes setup from install flow, point to hermes model/tools instead

The installer already handles full setup (provider config, etc.), so
telling users to run 'hermes setup' post-install is redundant and
confusing. Updated all docs to reflect the correct flow:

1. Run the installer (handles everything including provider setup)
2. Use 'hermes model', 'hermes tools', 'hermes gateway setup' to
   reconfigure individual settings later

Files updated:
- README.md: removed setup from quick install & getting started
- installation.md: updated post-install, manual step 9, troubleshooting
- quickstart.md: updated provider section & quick reference table
- cli-commands.md: updated hermes setup description
- faq.md: replaced hermes setup references with specific commands

README.md

@@ -41,7 +41,6 @@ After installation:
 
 ```bash
 source ~/.bashrc    # reload shell (or: source ~/.zshrc)
-hermes setup        # configure your LLM provider
 hermes              # start chatting!
 ```
 
@@ -52,7 +51,7 @@ hermes              # start chatting!
 ```bash
 hermes              # Interactive CLI — start a conversation
 hermes model        # Switch provider or model
-hermes setup        # Re-run the setup wizard
+hermes tools        # Configure which tools are enabled
 hermes gateway      # Start the messaging gateway (Telegram, Discord, etc.)
 hermes update       # Update to the latest version
 hermes doctor       # Diagnose any issues