feat(explorer): get observer url from chain config

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[changeset-bot]

🦋 Changeset detected

Latest commit: 430f4ba

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 25 packages

Name	Type
@latticexyz/explorer	Patch
@latticexyz/common	Patch
@latticexyz/block-logs-stream	Patch
@latticexyz/cli	Patch
@latticexyz/config	Patch
@latticexyz/dev-tools	Patch
@latticexyz/faucet	Patch
@latticexyz/protocol-parser	Patch
@latticexyz/stash	Patch
@latticexyz/store-indexer	Patch
@latticexyz/store-sync	Patch
@latticexyz/store	Patch
@latticexyz/world-modules	Patch
@latticexyz/world	Patch
@latticexyz/world-module-erc20	Patch
@latticexyz/react	Patch
@latticexyz/world-module-metadata	Patch
@latticexyz/abi-ts	Patch
create-mud	Patch
@latticexyz/gas-report	Patch
@latticexyz/recs	Patch
@latticexyz/schema-type	Patch
solhint-config-mud	Patch
solhint-plugin-mud	Patch
@latticexyz/utils	Patch

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