Jarvis: AI note-taking assistant

pre-release with a number of features planned for v0.8.0. bold: added in this release.

• new features
  • revamped note edit command interface (@jakubjezek001)
  • jump to line of found note chunk from panel
  • chat context preview dialog
  • token counter command
  • display note similarity score in panel
• new settings
  • Notes: Context tokens: the number of context tokens to extract from notes in "Chat with your notes" (previously used Chat: Memory tokens)
  • Notes: Context history: the number of user prompts to base notes context on for "Chat with your notes"
  • Notes: Custom prompt: the prompt (or additional instructions) to use for generating "Chat with your notes" responses
  • Notes: Parallel jobs: the number of parallel jobs to use for calculating text embeddings
• chat improvements
  • chat display format
  • chat with notes default prompt
  • chat parsing
• general improvements
  • CodeMirror 6 / beta editor support
  • load USE from cache instead of re-downloading every time
  • faster model test
• new models
  • replace text-davinci models with gpt-3.5-turbo-instruct (@jakubjezek001)
• ux
  • new standard dialog style