T2730

Depends on D12601

This diff deprecates the remaining use of BCH-JS' transaction builder and replaces it with the local implementation for the burnToken function and unit tests.

Pt 1/8 - Localize Transaction Builder module
Pt 2/8 - Deprecate BCH.TransactionBuilder in sendXec
Pt 3/8 - Add local TxBuilder to createToken
Pt 4/8 - Deprecate BCH.TransactionBuilder in createToken
Pt 5/8 - Add local TxBuilder to sendToken
Pt 6/8 - Deprecate BCH.TransactionBuilder in sendToken
Pt 7/8 - Add local TxBuilder to burnToken
Pt 8/8 - Deprecate remaining BCH.TransactionBuilder references

• grep -r 'BCH.TransactionBuilder' src/ and ensure no results
• npm ci
• npm test and ensure no errors with txBuilder.test.js
• npm start
• burn an existing token and ensure burn token tx is successfully broadcasted
• burn a newly created token and ensure burn token tx is successfully broadcasted
• create a new token and ensure genesis tx is still successfully broadcasted
• send an existing token and ensure send token tx is still successfully broadcasted
• send a newly created token and ensure send token tx is still successfully broadcasted