Replace solc-select with svm-rs in CI and docs

svm-rs is already in tree as a library, so we may as well include it as a bin
instead of also pulling in solc-select.

docs/Getting Started.md

@@ -35,9 +35,9 @@ rustup target add wasm32-unknown-unknown --toolchain nightly
 ### Install Solidity
 
 ```
-sudo pip3 install solc-select
-solc-select install 0.8.16
-solc-select use 0.8.16
+cargo install svm-rs
+svm install 0.8.16
+svm use 0.8.16
 ```
 
 ### Install Solidity Compiler Version Manager