chore: migrate repository to standard knowledge base layout

skills/coingecko/references/contract.md

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+# Coingecko - Contract
+
+**Pages:** 1
+
+---
+
+## NFTs Collection Data by Contract Address
+
+**URL:** llms-txt#nfts-collection-data-by-contract-address
+
+Source: https://docs.coingecko.com/v3.0.1/reference/nfts-contract-address
+
+v3.0.1/reference/api-reference/coingecko-demo.json get /nfts/{asset_platform_id}/contract/{contract_address}
+This endpoint allows you to **query all the NFT data (name, floor price, 24hr volume ...) based on the NFT collection contract address and respective asset platform**
+
+* You may also obtain the asset platform id and contract address through [/nfts/list](https://docs.coingecko.com/v3.0.1/reference/nfts-list) endpoint.
+</Tip>
+
+* Solana NFT & Art Blocks are not supported for this endpoint, please use [/nfts/\{id}](https://docs.coingecko.com/v3.0.1/reference/nfts-id) endpoint instead.
+  * Cache / Update Frequency: every 60 seconds for all the API plans.
+</Note>
+
+---