Remove VITE_DISABLE_ESLINT_CHECKER environment variable (#15943)

The `VITE_DISABLE_ESLINT_CHECKER` environment variable is removed from
the codebase. ESLint checker no longer runs during Vite builds
(equivalent to the previous `VITE_DISABLE_ESLINT_CHECKER=true`
behavior).

**Configuration**
- Removed from `.env.example` (active and commented lines)
- Removed from `vite.config.ts` destructuring and conditional logic
- Removed from build scripts in `package.json` and `nx.json`

**Code change in vite.config.ts:**
```diff
- if (VITE_DISABLE_ESLINT_CHECKER !== 'true') {
-   checkers['eslint'] = {
-     lintCommand: 'eslint ../../packages/twenty-front --max-warnings 0',
-     useFlatConfig: true,
-   };
- }
```

**Documentation**
- Updated main English troubleshooting guide to remove references to the
variable
- Translated documentation files are intentionally not modified and will
be handled by a separate workflow

> [!NOTE]
> ESLint will not run in the background via Vite's checker plugin.
Developers will need to run `npx nx lint twenty-front` manually or rely
on their IDE's ESLint extension for real-time feedback on open files.

Created from VS Code via the <a
href="https://marketplace.visualstudio.com/items?itemName=GitHub.vscode-pull-request-github">GitHub
Pull Request</a> extension.

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<details>

<summary>Original prompt</summary>

> Your job is to delete everything related to
VITE_DISABLE_ESLINT_CHECKER in the codebase.
> 
> We mention this env var in documentation: drop the content talking
about it.
> 
> We use it in the vite config: drop the check and keep the code paths
that used to run when `VITE_DISABLE_ESLINT_CHECKER=true`.
> 
> User has selected text in file packages/twenty-front/.env.example from
3:1 to 3:28


</details>

Created from VS Code via the [GitHub Pull
Request](https://marketplace.visualstudio.com/items?itemName=GitHub.vscode-pull-request-github)
extension.

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nx.json

@@ -133,7 +133,7 @@
       "outputs": ["{projectRoot}/{options.output-dir}"],
       "options": {
         "cwd": "{projectRoot}",
-        "command": "VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true storybook build --test",
+        "command": "VITE_DISABLE_TYPESCRIPT_CHECKER=true storybook build --test",
         "output-dir": "storybook-static",
         "config-dir": ".storybook"
       },

packages/twenty-docs/developers/self-hosting/troubleshooting.mdx

@@ -69,7 +69,7 @@ This should work out of the box with the eslint extension installed. If this doe
 
 #### While running `npx nx start` or `npx nx start twenty-front`, Out of memory error is thrown
 
-In `packages/twenty-front/.env` uncomment `VITE_DISABLE_TYPESCRIPT_CHECKER=true` and `VITE_DISABLE_ESLINT_CHECKER=true` to disable background checks thus reducing amount of needed RAM.
+In `packages/twenty-front/.env` uncomment `VITE_DISABLE_TYPESCRIPT_CHECKER=true` to disable background checks thus reducing amount of needed RAM.
 
 **If it does not work:**  
 Run only the services you need, instead of `npx nx start`. For instance, if you work on the server, run only `npx nx worker twenty-server`

packages/twenty-front/.env.example

@@ -1,13 +1,11 @@
 REACT_APP_SERVER_BASE_URL=http://localhost:3000
 VITE_BUILD_SOURCEMAP=false
-VITE_DISABLE_ESLINT_CHECKER=true
 
 
 # ———————— Optional ————————
 # REACT_APP_PORT=3001
 # CHROMATIC_PROJECT_TOKEN=
 # VITE_DISABLE_TYPESCRIPT_CHECKER=true
-# VITE_DISABLE_ESLINT_CHECKER=true
 # VITE_ENABLE_SSL=false
 # VITE_HOST=localhost.com
 # SSL_KEY_PATH="./certs/your-cert.key"

packages/twenty-front/package.json

@@ -3,8 +3,8 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "build": "NODE_ENV=production VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true NODE_OPTIONS=--max-old-space-size=8192 npx vite build && sh ./scripts/inject-runtime-env.sh",
-    "build:sourcemaps": "NODE_ENV=production VITE_BUILD_SOURCEMAP=true VITE_DISABLE_TYPESCRIPT_CHECKER=true VITE_DISABLE_ESLINT_CHECKER=true NODE_OPTIONS=--max-old-space-size=8192 npx vite build && sh ./scripts/inject-runtime-env.sh",
+    "build": "NODE_ENV=production VITE_DISABLE_TYPESCRIPT_CHECKER=true NODE_OPTIONS=--max-old-space-size=8192 npx vite build && sh ./scripts/inject-runtime-env.sh",
+    "build:sourcemaps": "NODE_ENV=production VITE_BUILD_SOURCEMAP=true VITE_DISABLE_TYPESCRIPT_CHECKER=true NODE_OPTIONS=--max-old-space-size=8192 npx vite build && sh ./scripts/inject-runtime-env.sh",
     "start:prod": "NODE_ENV=production npx serve -s build",
     "tsup": "npx tsup"
   },

packages/twenty-front/vite.config.ts

@@ -24,7 +24,6 @@ export default defineConfig(({ command, mode }) => {
     REACT_APP_SERVER_BASE_URL,
     VITE_BUILD_SOURCEMAP,
     VITE_DISABLE_TYPESCRIPT_CHECKER,
-    VITE_DISABLE_ESLINT_CHECKER,
     VITE_HOST,
     SSL_CERT_PATH,
     SSL_KEY_PATH,
@@ -59,10 +58,6 @@ export default defineConfig(({ command, mode }) => {
     );
   }
 
-  if (VITE_DISABLE_ESLINT_CHECKER === 'true') {
-    console.log(`VITE_DISABLE_ESLINT_CHECKER: ${VITE_DISABLE_ESLINT_CHECKER}`);
-  }
-
   if (VITE_BUILD_SOURCEMAP === 'true') {
     console.log(`VITE_BUILD_SOURCEMAP: ${VITE_BUILD_SOURCEMAP}`);
   }
@@ -73,13 +68,6 @@ export default defineConfig(({ command, mode }) => {
     };
   }
 
-  if (VITE_DISABLE_ESLINT_CHECKER !== 'true') {
-    checkers['eslint'] = {
-      lintCommand: 'eslint ../../packages/twenty-front --max-warnings 0',
-      useFlatConfig: true,
-    };
-  }
-
   return {
     root: __dirname,
     cacheDir: '../../node_modules/.vite/packages/twenty-front',