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* fix outdated tests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.node.json

@@ -1,5 +1,8 @@
 {
-  "extends": "@vue/tsconfig/tsconfig.node.json",
+  "extends": [
+    "@tsconfig/node18/tsconfig.json",
+    "@vue/tsconfig/tsconfig.json"
+  ],
   "include": [
     "vite.config.*",
     "vitest.config.*",