[Feature Request] Add option to disable animated mottle effect

Bug Description
disabled the Mottle - I dont like it running on my screen I have a OCD and its drive me craisy

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.89
• Feedback ID: e8bc758d-1e64-40e1-a454-f4f037b4e68c

Errors

[{"error":"MaxFileReadTokenExceededError: File content (12326 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n    at S7_ (B:/~BUN/root/src/entrypoints/cli.js:4351:13364)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-01T14:18:30.059Z"}]