chore(reth-primitives): no_std support

[martinezjorge]

Helps progress #9478

[martinezjorge]

This was meant to be a draft PR. Still have to get all the tests to pass, but any feedback on the current changes would be greatly appreciated.

[mattsse]

thanks for this

I believe with #9556 this is now actually completed.
sorry for sniping this...

[martinezjorge]

Oh ok, no worries. I'll study what you did to learn.

[nkysg]

thanks for this

I believe with #9556 this is now actually completed. sorry for sniping this...

I think #9556 not completed. I run cmd

 cargo c --no-default-features -p reth-primitives
    Checking reth-primitives v1.0.3 (/Users/YSG/Github/reth/crates/primitives)
error[E0433]: failed to resolve: use of undeclared crate or module `std`
 --> crates/primitives/src/transaction/error.rs:7:1
  |
7 | pub enum InvalidTransactionError {
  | ^^^ use of undeclared crate or module `std`
  |
help: consider importing this module
  |
1 + use core::error;
  |

error[E0433]: failed to resolve: use of undeclared crate or module `std`
  --> crates/primitives/src/transaction/error.rs:63:1
   |
63 | pub enum TransactionConversionError {
   | ^^^ use of undeclared crate or module `std`
   |
help: consider importing this module
   |
1  + use core::error;

Please take a look at @mattsse . Thanks.