SOV-5283: add bos as collateral for borrowing

[creed-victor]

https://sovryn.atlassian.net/browse/SOV-5283

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Latest commit: 543fc66

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[Copilot]

Pull request overview

This PR adds BOS (BitcoinOS Token) as collateral for borrowing operations across different lending pools. The main purpose is to enable BOS token to be used as collateral when borrowing DLLR, RUSDT, XUSD, DOC, and RBTC.

Key changes include:

• Adding BOS token configuration to asset definitions for both mainnet and testnet environments
• Updating lending pool configurations to accept BOS as collateral across multiple pools
• Refactoring the open loans fetching logic from GraphQL subgraph to direct smart contract queries using React Query

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/contracts/src/contracts/assets/rskTestnet.ts	Adds BOS token configuration for testnet environment
packages/contracts/src/contracts/assets/rsk.ts	Normalizes BOS token address to lowercase for mainnet
apps/frontend/src/utils/asset.ts	Adds BOS symbol constant to COMMON_SYMBOLS
apps/frontend/src/utils/LendingPoolDictionary.ts	Updates lending pools to accept BOS as collateral
apps/frontend/src/constants/infrastructure/bsc.ts	Changes BSC RPC endpoints from WebSocket to HTTP
apps/frontend/src/app/5_pages/BorrowPage/components/OpenLoansTable/hooks/useGetOpenLoans.ts	Refactors loan fetching from GraphQL to React Query with direct contract calls
.vscode/settings.json	Adds editor formatting and code action settings
.vscode/extensions.json	Adds recommended VSCode extensions

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