feat: add integration tests (#6923)

### Summary

This PR introduces several integration tests, a mix of manually written
tests and those generated using the `generate-integration-tests` Python
script located in the `scripts` folder.

### Tests Added:
- **Authentication tests**: Validating login, registration, and token
handling.
- **FindMany queries**: Fetching multiple records for all existing
entities that do not require input arguments.

### How the Integration Tests Work:
- A `setupTest` function is called during the Jest test run. This
function initializes a test instance of the application and exposes it
on a dedicated port.
- Since tests are executed in isolated workers, they do not have direct
access to the in-memory app instance. Instead, the tests query the
application through the exposed port.
- A static accessToken is used, this one as a big expiration time so it
will never expire (365 years)
- The queries are executed, and the results are validated against
expected outcomes.

### Current State and Next Steps:
- These tests currently run using the existing development seed data. We
plan to introduce more comprehensive test data using `faker` to improve
coverage.
- At the moment, the only mutation tests implemented are for
authentication. Future updates should include broader mutation testing
for other entities.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/project.json

@@ -11,6 +11,16 @@
         "commands": ["rimraf dist", "nest build --path ./tsconfig.build.json"]
       }
     },
+    "test:integration": {
+      "executor": "nx:run-commands",
+      "options": {
+        "cwd": "packages/twenty-server",
+        "commands": [
+          "NODE_ENV=test nx database:reset > reset-logs.log && NODE_ENV=test nx jest --config ./jest-integration.config.ts"
+        ]
+      },
+      "parallel": false
+    },
     "build:packageJson": {
       "executor": "@nx/js:tsc",
       "options": {
@@ -108,12 +118,11 @@
         "command": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register ../../node_modules/.bin/jest --runInBand"
       }
     },
-    "test:e2e": {
+    "jest": {
       "executor": "nx:run-commands",
-      "dependsOn": ["build"],
       "options": {
         "cwd": "packages/twenty-server",
-        "command": "./scripts/run-integration.sh"
+        "command": "jest"
       }
     },
     "database:migrate": {
@@ -140,6 +149,16 @@
         "parallel": false
       }
     },
+    "generate:integration-test": {
+      "executor": "nx:run-commands",
+      "options": {
+        "cwd": "packages/twenty-server",
+        "commands": [
+          "nx ts-node-no-deps -- ./scripts/generate-integration-tests/index.ts"
+        ],
+        "parallel": false
+      }
+    },
     "database:reset": {
       "executor": "nx:run-commands",
       "dependsOn": ["build"],