Edit tool + Create tool tweaks

[RomneyDa]

Description

• Adds lazy apply with updateApplyState messages for Jetbrains
• Edit tool with custom tool call UI and accept/reject buttons
• Disables submitting tip tap editors while this apply states are pending (for now)
• error if attempting to create file that already exists. This is important because right now it overwrites in a way that is not undo-able, and this is bad regardless of if an edit tool is available
• Both create and edit tool call UIs hide the codeblock toolbar apply button
• Fixes generating logic error causing multiple codeblocks to show generating

Originally (see 4683a20) I enabled core to initiate applyToFile within a core-side edit tool implementation, and generated a stream id on GUI that was passed to core and then around from there. The main issue with this was a lack of stateful awareness of diffs in core before passing tool output back to model. I found this to be a bad user experience.

I ended up deciding that it's okay to have a custom Edit tool implementation in GUI that bypasses the other tools. This opens up channels for potential tools like a "new session" tool that would also be GUI-only. I added toolCallId to Apply state so that apply streams can optionally be associated with tool calls.

[netlify]

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