Changed "Local Server" to "Custom Server"

[machinewrapped]

Renamed "Local Server" provider to "Custom Server" - it was never a requirement that the server be local, so this makes it clearer that the provider can be used with any OpenAI-compatible API.

Added a max_completion_tokens option for Custom Server, since OpenAI are no longer accepting max_tokens for some of their own models. You should probably set one or the other or neither, not both.

Plus several arguably more important fixes for non-Windows platforms:

• Fixed the MacOS package builder
• Updated to latest PySide6 GUI modules
• Force the Qt theme to Fusion Light, for cross-platform compatibility with app themes
• Added a light Large theme

Removed boto3 from the packaged build to reduce the size - Bedrock is pretty niche, and if you can handle setting up AWS then you can definitely handle installing gpt-subtrans from source!

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This discussion was created from the release Changed "Local Server" to "Custom Server".

[machinewrapped]

Note: if you are using a custom server from the command line and set up configuration values in a .env file, you will need to replace LOCAL_ with CUSTOM_ in the parameter names after updating to latest.