Handle case where large messages would exceed context window

[mrubens]

Attempt to fix the issue where long messages overflow the context window, leaving the user stuck.

---

Important

Introduces ContextWindow class to manage message sizes in Cline, with tests for validation and truncation logic.

• Behavior:
  • Introduces ContextWindow class in ContextWindow.ts to manage message size and context window limits.
  • Updates Cline class in Cline.ts to use ContextWindow for message size validation and history truncation.
  • Handles large messages by checking if they exceed the context window and prompts user to retry if necessary.
• Testing:
  • Adds ContextWindow.test.ts to test message size calculation, validation, and history truncation logic.
  • Tests various scenarios including different model configurations and token types.

^{This description was created by for 4ea817bd67023e8474936a051bd46f559b8c38e9. It will automatically update as commits are pushed.}

[changeset-bot]

⚠️ No Changeset found

Latest commit: 357f0e0

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[mrubens]

Closed in favor of #251