Add `rootstock` trezor config

[ahsan-javaiid]

Description

• This PR adds trezor configuration for the rootstock network.

• This PR also fixes a bug while signing the transactions using trezor by replacing this line

  const rv = BigInt(result.payload.v.replace("0x", "")); // This line gives error: Uncaught SyntaxError: Cannot convert 5f to a BigInt
  Reason: Consider v = '0x5f'. The replace is removing 0x and then BigInt does not understand 5f as a hex value because 0x prefix is missing.
  
  Fixed it by using parseInt function.
  const rv = BigInt(parseInt(result.payload.v, 16));

Testing:

• After applying these changes this PR is tested with both ethereum and rootstock networks using trezor
• Works fine with both networks

[ahsan-javaiid]

Credits @alepc253

cc: @kvhnuke for review.

[kvhnuke]

@ahsan-javaiid thanks for the bug fix as well!