Reverts ArcadeAI/arcade-mcp#759
<!-- CURSOR_SUMMARY -->
---
> [!NOTE]
> **Medium Risk**
> Adds a new LangChain/LangGraph integration layer that wraps and
executes Arcade tools, including authorization and error/interrupt
handling; bugs here could impact tool execution semantics for adopters.
Changes are mostly additive and scoped to `contrib/langchain`.
>
> **Overview**
> Re-introduces a standalone `contrib/langchain` Python package
(`langchain-arcade`) to expose Arcade tools as LangChain
`StructuredTool`s.
>
> Adds sync/async `ToolManager` implementations plus utilities to
generate Pydantic arg schemas from `ToolDefinition`, optionally rewrite
tool names (underscores vs dots), and handle authorization via LangGraph
`NodeInterrupt` or structured error responses.
>
> Includes packaging/dev scaffolding (`pyproject.toml`, `tox.ini`,
`Makefile`, `.gitignore`, `LICENSE`, `README`) and a comprehensive test
suite covering manager behaviors and auth flows.
>
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
abd23b6d954470cb1e7376158468c0e59cdc7d7a. This will update automatically
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[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->
Addresses general improvements to all toolkits including changing ruff
from python 3.9 to python 3.10 which is the reason for the removal of
Optional[] among others.
Also, turns out that our `make install` for toolkits wasn't correctly
checking for whether poetry was installed (&> /dev/null syntax isn't
supported by our check-toolkits GitHub action, so we were installing
poetry twice. I replaced with the more portable >/dev/null 2>&1)
Question: Should we also change ruff to py310 for the `arcade/` package
in a later PR?
-------------------
CU-86b4gzyp6
# PR Description
* This PR updates code in `examples/` to be compatible with version
1.0.0
* This PR removes the Spotify examples since the Arcade hosted worker
doesn't currently cataloge the Spotify toolkit. We can reintroduce these
examples when it does.
* This PR performs various renames across the codebase for
`arcade-ai.com` --> `arcade.dev` and `Arcade AI` --> `Arcade`
