Release cli/v0.8.3

• Add support for new OpenAI models: gpt-4-turbo and gpt-4-turbo-2024-04-09
• Make gpt-4-turbo model the new default model for the planner, builder, and auto-continue roles -- in testing it seems to be better at reasoning and significantly less lazy than the previous default for these roles, gpt-4-turbo-preview -- any plan that has not previously had its model settings modified will now use gpt-4-turbo by default (those that have been modified will need to be updated manually) -- remember that you can always use plandex set-model to change models for your plans
• Fix for set-model command argument parsing (#75)
• Fix for panic during plan stream when a file name's length exceeds the terminal width (#84)
• Fix for handling files that are loaded into context and later deleted from the file system (#47)
• Fix to prevent loading of duplicate files, directory trees, or urls into context (#57)