feat: add staking support to Udon protocol on Chromia

[nathanielfsn]

Summary

This PR adds staking functionality to the Udon protocol adapter on Chromia blockchain.

Changes

• Added staking function to track total staked STCHR tokens
• Refactored query URL building with helper function buildQueryUrl
• Added constants for STCHR asset ID and decimals
• Integrated staking endpoint: get_total_stake_all_users
• Added price fetching for STCHR token to calculate USD value

Technical Details

• Uses get_total_stake_all_users query to fetch total staked amount
• Fetches STCHR price via get_latest_price_by_asset_id
• Calculates TVL in USD by multiplying staked amount with token price
• Properly handles decimals (6 decimals for STCHR)

Testing

• Staking function properly calculates USD value from staked tokens
• Query URL builder handles parameters correctly

[llamabutler]

The adapter at projects/udon exports TVL:

chromia                   334.58 k
chromia-borrowed          67.71 k
borrowed                  67.71 k
chromia-staking           1.49 k
staking                   1.49 k

total                    334.58 k 

[waynebruce0x]

can we export a token balance here instead?