1635 extensibilitytwenty cli app vars (#15143)

- Update twenty-cli to support application env variable definition
- Update twenty-server to create a new `core.applicationVariable` entity
to store env variables and provide env var when executing serverless
function
- Update twenty-front to support application environment variable value
setting

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src="https://github.com/user-attachments/assets/24c3d323-5370-4a80-8174-fc4653cc3c22"
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src="https://github.com/user-attachments/assets/fb7425a3-facc-4895-a5eb-8a8e278e0951"
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src="https://github.com/user-attachments/assets/113da8a2-5590-433c-b1b3-5ed3137f24ca"
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src="https://github.com/user-attachments/assets/353b16c6-0527-444c-87d6-51447a96cbc7"
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packages/twenty-cli/src/utils/app-manifest-loader.ts

@@ -1,3 +1,4 @@
+import dotenv from 'dotenv';
 import assert from 'assert';
 import * as fs from 'fs-extra';
 import * as path from 'path';
@@ -111,12 +112,44 @@ export const loadManifest = async (
   manifest: AppManifest;
 }> => {
   const packageJsonPath = await findPathFile(appPath, 'package.json');
+
   const rawPackageJson = await parseJsoncFile(packageJsonPath);
 
   const yarnLockPath = await findPathFile(appPath, 'yarn.lock');
+
   const rawYarnLock = await fs.readFile(yarnLockPath, 'utf8');
 
-  await validateSchema('appManifest', rawPackageJson, packageJsonPath);
+  let envFile = '';
+
+  try {
+    const envFilePath = await findPathFile(appPath, '.env');
+
+    envFile = await fs.readFile(envFilePath, 'utf8');
+  } catch {
+    // Allow missing .env
+  }
+
+  const envVariables = dotenv.parse(envFile);
+
+  const packageJsonEnv = rawPackageJson.env || {};
+
+  for (const key of Object.keys(envVariables)) {
+    if (packageJsonEnv[key]) {
+      packageJsonEnv[key] = {
+        isSecret: false,
+        ...packageJsonEnv[key],
+        value: envVariables[key],
+      };
+    } else {
+      throw new Error(
+        `Environment variable "${key}" is defined in .env but missing from package.json. Please add it to the "env" section in package.json.`,
+      );
+    }
+  }
+
+  const packageJson = { ...rawPackageJson, env: packageJsonEnv };
+
+  await validateSchema('appManifest', packageJson, packageJsonPath);
 
   const agents = await loadCoreEntity(
     path.join(appPath, 'agents'),
@@ -134,10 +167,10 @@ export const loadManifest = async (
   );
 
   return {
-    packageJson: rawPackageJson,
+    packageJson,
     yarnLock: rawYarnLock,
     manifest: {
-      ...rawPackageJson,
+      ...packageJson,
       agents,
       objects,
       serverlessFunctions,