chore: use Nx affected tasks in CI (#5110)

Closes #5097

- Uses "nx affected" to detect what projects need to be checked in the
current PR (for now, `ci-front` and `ci-server` workflows only).
- Caches results of certain tasks (`lint`, `typecheck`, `test`,
`storybook:build`) when a PR pipeline runs. The next runs of the same
PR's pipeline will then be able to reuse the PR's task cache to execute
tasks faster.
- Caches Yarn's cache folder to install dependencies faster in CI jobs.
- Rewrites the node modules cache/install steps as a custom, reusable
Github action.
- Distributes `ci-front` jobs with a "matrix" strategy.
- Sets common tasks config at the root `nx.json`. For instance, to
activate the `typecheck` task in a project, add `typecheck: {}` to its
`project.json` and it'll use the default config set in `nx.json` for the
`typecheck` task. Options can be overridden in each individual
`project.json` if needed.
- Adds "scope" tags to some projects: `scope:frontend`, `scope:backend`,
`scope:shared`. An eslint rule ensures that `scope:frontend` only
depends on `scope:frontent` or `scope:shared` projects, same for
`scope:backend`. These tags are used by `nx affected` to filter projects
by scope and generates different task cache keys according to the
requested scope.
- Enables checks for twenty-emails in the `ci-server` workflow.

packages/twenty-server/project.json

@@ -2,6 +2,7 @@
   "name": "twenty-server",
   "$schema": "../../node_modules/nx/schemas/project-schema.json",
   "projectType": "application",
+  "tags": ["scope:backend"],
   "targets": {
     "build": {
       "executor": "nx:run-commands",
@@ -35,6 +36,16 @@
         "command": "nx start --debug"
       }
     },
+    "reset:env": {
+      "executor": "nx:run-commands",
+      "inputs": ["{projectRoot}/.env.example"],
+      "outputs": ["{projectRoot}/.env"],
+      "cache": true,
+      "options": {
+        "cwd": "{projectRoot}",
+        "command": "cp .env.example .env"
+      }
+    },
     "command": {
       "executor": "nx:run-commands",
       "dependsOn": ["build"],
@@ -81,42 +92,16 @@
       }
     },
     "lint": {
-      "executor": "@nx/eslint:lint",
       "options": {
-        "eslintConfig": "{projectRoot}/.eslintrc.cjs",
-        "ignorePath": "{workspaceRoot}/.gitignore",
         "lintFilePatterns": ["{projectRoot}/src/**/*.{ts,json}"]
       },
       "configurations": {
         "ci": { "lintFilePatterns": ["{projectRoot}/**/*.{ts,json}"] },
-        "fix": { "fix": true }
+        "fix": {}
       }
     },
-    "test:unit": {
-      "executor": "nx:run-commands",
-      "dependsOn": ["build"],
-      "options": {
-        "cwd": "packages/twenty-server",
-        "command": "jest"
-      }
-    },
-    "test:unit:watch": {
-      "executor": "nx:run-commands",
-      "dependsOn": ["build"],
-      "options": {
-        "cwd": "packages/twenty-server",
-        "command": "jest --watch"
-      }
-    },
-    "test:unit:coverage": {
-      "executor": "nx:run-commands",
-      "dependsOn": ["build"],
-      "options": {
-        "cwd": "packages/twenty-server",
-        "command": "jest --coverage"
-      }
-    },
-    "test:unit:debug": {
+    "test": {},
+    "test:debug": {
       "executor": "nx:run-commands",
       "options": {
         "cwd": "packages/twenty-server",