Adds prettier as a hook and github action

.github/workflows/main.yaml

@@ -67,6 +67,12 @@ jobs:
 
     - name: Solidty Lint
       run: solhint 'contracts/**/*.sol'
+
+    - name: Prettify code
+      uses: creyD/prettier_action@v4.3
+      with:
+        prettier_plugins: '@prettier/plugin-solidity'
+        prettier_options: --check --plugin=prettier-plugin-solidity 'contracts/**/*.sol'
 
     - name: Python lint
       uses: cclauss/GitHub-Action-for-pylint@0.7.0

.prettierignore

@@ -0,0 +1,5 @@
+**/contracts/contracts/proxy/
+**/contracts/contracts/StakingEscrow.sol
+**/contracts/contracts/NuCypherToken.sol
+**/contracts/test/proxy/
+**/contracts/test/StakingEscrowTestSet.sol

.prettierrc.json

@@ -0,0 +1,3 @@
+{
+  "printWidth":100
+}