Fixed cloudflare fetch

[IJIJI]

Fixed the scraping of Cloudflare-protected sites. I have only tested this with LCSC (#291
) and Digikey, but I expect it to fix the Cloudflare blocking of other platforms that where failing before?
Also, the LCSC mappings have changed. I have changed it to only look at the keys of values that don't change as often, to improve long-term stability.

[Copilot]

Pull request overview

This PR aims to improve scraping/fetching reliability for Cloudflare-protected supplier endpoints (notably LCSC/Digi-Key) and make the LCSC API “test” check less brittle against upstream text changes.

Changes:

• Add a Cloudflare-aware fallback path in download() by retrying API fetches via cloudscraper.
• Adjust LCSC test_api() expectations to rely on stable identity fields plus a loose check on the free-text description.
• Regenerate poetry.lock (Poetry 2.4.1) and update .gitignore entries.

Reviewed changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated 2 comments.

File	Description
kintree/common/tools.py	Adds cloudscraper helper and introduces a requests→cloudscraper→urllib fallback chain for JSON API downloads.
kintree/search/lcsc_api.py	Makes the LCSC API test less sensitive to changing description strings.
poetry.lock	Lockfile regenerated; includes notable dependency source changes (e.g., digikey-api via Git).
.gitignore	Ignores the whole .vscode folder and a Copilot instructions file.

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