Feat/initial plan (#6)

* chore: upgrade libs

* fix outdated tests

* init edit steps form

* tasks have now initialPlan

* simpler to directly have an history and put initialPlan and steps has getters

* consistent test script names

* display initial plan to task view

* display initial if only it exists (next when only it changes

* display initial plan only if it chanegd

tsconfig.app.json

@@ -1,5 +1,5 @@
 {
-  "extends": "@vue/tsconfig/tsconfig.web.json",
+  "extends": "@vue/tsconfig/tsconfig.dom.json",
   "include": ["env.d.ts", "src/**/*", "src/**/*.vue"],
   "exclude": ["src/**/__tests__/*"],
   "compilerOptions": {