docs: fix typos in code comments and examples

[Avicennasis]

Summary

Fixes 10 verified typos/grammar issues in code comments and example scripts (12 lines, 7 files). Comments only - no code, identifiers or behaviour changed.

• src/base/contracts/contractInstances.ts: some contracts has sub levels -> some contracts have sub levels (3 occurrences)
• src/base/contracts/contractInstances.ts: e.g Tron has -> e.g. Tron has (3 occurrences)
• src/base/contracts/contractInstances.ts: // If no exists a default intance create one -> // If no default instance exists, create one
• eth/examples/MakerDAO/closeCDP.ts: This assume you -> This assumes you
• eth/examples/MakerDAO/closeCDP.ts: It also assume you -> It also assumes you
• eth/examples/Sushiswap/createLiquidityPool.ts: minimum amout of DAI -> minimum amount of DAI
• eth/examples/Sushiswap/createLiquidityPool.ts: minimum amout of UNI -> minimum amount of UNI
• eth/examples/Sushiswap/kashiBorrow.ts, kashiLend.ts: for information in v, r, s visit -> for information on v, r, s, visit
• eth/examples/SKALE/listDelegationFromEscrow.ts, listDelegation.ts: for th token holder -> for the token holder

Where the same typo appeared more than once in the repo, every occurrence was fixed so the tree stays consistent.