[FEATURE]: configure thinking block to be expandable by default #28280

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

According to release tag v1.15.1,

Added a collapsed thinking view that can be expanded inline.

But, personally, I get a lot of inspiration from the model's thinking block, how the model is reasoning my request, and how I should instruct the model next. But as far as I know, there is no official method to expand this thinking block by default. So, I want there to be some configurable parameter under ~/.config/opencode/opencode.jsonc or so.