feat: add step preconditions (#19)

* fix: add @slangroom/ethereum plugin

* refactor: create slangroom.ts and utils.ts

Prepared slangroom instance for preconditions and make readFromfile async

* refactor: move function to execute shell command or js function in utils

* feat: add step preconditions

Preconditions can be a js function or a zencode contract

* chore: fix some types

* chore: fix verbose message

* test: add precondition tests

refactor also them dividing json and yaml chains tests

* chore: remove codecov badge

README.md

@@ -10,9 +10,6 @@ SPDX-License-Identifier: AGPL-3.0-or-later
 </h1>
 
 <p align="center">
-  <a href="https://codecov.io/gh/dyne/slangroom-chain">
-    <img src="https://codecov.io/gh/dyne/slangroom-chain/branch/master/graph/badge.svg" alt="coverage badge">
-  </a>
   <a href="https://dyne.org">
     <img src="https://img.shields.io/badge/%3C%2F%3E%20with%20%E2%9D%A4%20by-Dyne.org-blue.svg" alt="Dyne.org">
   </a>

package.json

@@ -64,7 +64,7 @@
     "typedoc": "^0.25.13",
     "typescript": "^5.4.5",
     "wip": "^1.3.0",
-    "zenroom": "^4.31.2"
+    "zenroom": "^4.45.1"
   },
   "plugins": [
     "@semantic-release/commit-analyzer",
@@ -130,6 +130,7 @@
   "dependencies": {
     "@slangroom/core": "^1.43.2",
     "@slangroom/db": "^1.43.2",
+    "@slangroom/ethereum": "^1.43.2",
     "@slangroom/fs": "^1.43.2",
     "@slangroom/git": "^1.43.2",
     "@slangroom/helpers": "^1.43.2",