feat: tuples

[mylesmmurphy]

This pull request introduces support for tuple types in the TypeScript plugin. The changes include modifications to handle tuple types in the type tree and to stringify tuple types.

Support for tuple types:

• packages/typescript-plugin/src/type-tree/index.ts: Added logic to handle tuple types in the getTypeTree function.
• packages/typescript-plugin/src/type-tree/types.ts: Updated the TypeTree type definition to include the tuple type structure.

Stringification of tuple types:

• packages/vscode-extension/src/stringify-type-tree.ts: Added logic to stringify tuple types in the stringifyTypeTree function.