Add Client Api generation (#17961)

## Add API client generation to SDK dev mode and refactor orchestrator
into step-based pipeline

### Why

The SDK dev mode lacked typed API client generation, forcing developers
to work without auto-generated GraphQL types when building applications.
Additionally, the orchestrator was a monolithic class that mixed watcher
management, token handling, and sync logic — making it difficult to
extend with new steps like client generation.

### How

- **Refactored the orchestrator** into a step-based pipeline with
dedicated classes: `CheckServer`, `EnsureValidTokens`,
`ResolveApplication`, `BuildManifest`, `UploadFiles`,
`GenerateApiClient`, `SyncApplication`, and `StartWatchers`. Each step
has typed input/output/status, managed by a new `OrchestratorState`
class.
- **Added `GenerateApiClientOrchestratorStep`** that detects
object/field schema changes and regenerates a typed GraphQL client (via
`@genql/cli`) into `node_modules/twenty-sdk/generated` for seamless
imports.
- **Replaced `checkApplicationExist`** with `findOneApplication` on both
server resolver and SDK API service, returning the entity data instead
of a boolean.
- **Added application token pair mutations**
(`generateApplicationToken`, `renewApplicationToken`) to the API
service, with the server now returning `ApplicationTokenPairDTO`
containing both access and refresh tokens.
- **Restructured the dev UI** into `dev/ui/components/` with dedicated
panel, section, and event log components.
- **Simplified `AppDevCommand`** from ~180 lines of watcher management
down to ~40 lines that delegate entirely to the orchestrator.

packages/twenty-docs/developers/extend/capabilities/apps.mdx

@@ -47,9 +47,6 @@ From here you can:
 # Add a new entity to your application (guided)
 yarn twenty entity:add
 
-# Generate a typed Twenty client and workspace entity types
-yarn twenty app:generate
-
 # Watch your application's function logs
 yarn twenty function:logs
 
@@ -140,7 +137,7 @@ export default defineObject({
 
 Later commands will add more files and folders:
 
-- `yarn twenty app:generate` will create a `generated/` folder (typed Twenty client + workspace types).
+- `yarn twenty app:dev` will auto-generate a typed API client in `node_modules/twenty-sdk/generated` (typed Twenty client + workspace types).
 - `yarn twenty entity:add` will add entity definition files under `src/` for your custom objects, functions, front components, or roles.
 
 ## Authentication
@@ -651,7 +648,7 @@ You can create new front components in two ways:
 
 ### Generated typed client
 
-Run `yarn twenty app:generate` to create a local typed client in `generated/` based on your workspace schema. Use it in your functions:
+The typed client is auto-generated by `yarn twenty app:dev` and stored in `node_modules/twenty-sdk/generated` based on your workspace schema. Use it in your functions:
 
 ```typescript
 import Twenty from '~/generated';
@@ -660,7 +657,7 @@ const client = new Twenty();
 const { me } = await client.query({ me: { id: true, displayName: true } });
 ```
 
-The client is re-generated by `yarn twenty app:generate`. Re-run after changing your objects or when onboarding to a new workspace.
+The client is re-generated automatically by `yarn twenty app:dev` whenever your objects or fields change.
 
 #### Runtime credentials in logic functions
 
@@ -697,13 +694,13 @@ Then add a `twenty` script:
 }
 ```
 
-Now you can run all commands via `yarn twenty <command>`, e.g. `yarn twenty app:dev`, `yarn twenty app:generate`, `yarn twenty help`, etc.
+Now you can run all commands via `yarn twenty <command>`, e.g. `yarn twenty app:dev`, `yarn twenty help`, etc.
 
 ## Troubleshooting
 
 - Authentication errors: run `yarn twenty auth:login` and ensure your API key has the required permissions.
 - Cannot connect to server: verify the API URL and that the Twenty server is reachable.
-- Types or client missing/outdated: run `yarn twenty app:generate`.
+- Types or client missing/outdated: restart `yarn twenty app:dev` — it auto-generates the typed client.
 - Dev mode not syncing: ensure `yarn twenty app:dev` is running and that changes are not ignored by your environment.
 
 Discord Help Channel: https://discord.com/channels/1130383047699738754/1130386664812982322