[agent] tools experiment with inspiration from claude-code

[xingyaoww]

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• Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below

End-user friendly description of the problem this fixes or functionality that this introduces.

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Give a summary of what the PR does, explaining any non-trivial design decisions.

Try reproducing sonnet 3.7 result with tools from claude-code (https://github.com/dnakov/claude-code/tree/main).

Main idea is:

• Add a thinking tool
• Break our str_replace_editor into two components: (1) read-write part that edits file; (2) read-only part that only read file/folder
• Add glob/grep tool (read-only)
• Add an agent delegate action to delegate to a "ReadOnlyCodeAct" for file exploration/localization operations

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Link of any specific issues this addresses.

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To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:84eeaef-nikolaik   --name openhands-app-84eeaef   docker.all-hands.dev/all-hands-ai/openhands:84eeaef

[xingyaoww]

ha! CodeAct delegate to CodeAct kinda start to work now :)

[enyst]

I love the split between tools, it makes things more readable! Since we're adding more tools here, it must have become necessary too 😅