refactor: monero-rs -> monero-oxide

[nabijaczleweli]

Closes #764

Ref: #775:

$ git diff -U0 upstream/master Cargo.lock | grep -FA1 '[[package]]' | paste - - -
-[[package]]    -name = "base58-monero" --
-[[package]]    -name = "fixed-hash"    --
-[[package]]    -name = "hex-literal"   --
-[[package]]    -name = "keccak-hash"   --
-[[package]]    -name = "monero"        --
+[[package]]    +name = "monero-amount" --
-[[package]]    -name = "primitive-types"       --
-[[package]]    -name = "rustc-hex"     --
-[[package]]    -name = "serde-big-array"       --
-[[package]]    -name = "tiny-keccak"

[binarybaron]

Thanks a lot for taking this on!

I'll review this soon. Over the holidays I'll have less time but I'll try to make this a priority.

The general approach looks sound. One nitpick I have is that I'd like to have all the monero-oxide extension types (alternatives to monero-rs) moved into a single crate. Name would probably be monero-oxide-ext.

We should also take a look at how Cuprate handles this.

I'll leave more detailed actionable comments soon.

[nabijaczleweli]

This does do this, I just called it monero-amount here.