Improve application ast (#17016)

# Summary

- Introduces a new, flexible folder structure for Twenty SDK
applications using file suffix-based entity detection
- Adds defineApp, defineFunction, defineObject, and defineRole helper
functions with built-in validation
- Refactors manifest loading to use jiti runtime evaluation for
TypeScript config files
- Separates validation logic into dedicated module with comprehensive
error reporting

  # New Application Folder Structure

Applications now use a convention-over-configuration approach where
entities are detected by their file suffix, allowing flexible
organization within the src/app/ folder.

  # Required Structure

    my-app/
    ├── package.json
    ├── yarn.lock
    └── src/
        ├── app/
│ └── application.config.ts # Required - main application configuration
└── utils/ # Optional - handler implementations & utilities

  # Entity Detection by File Suffix

    - *.object.ts - Custom object definitions
    - *.function.ts - Serverless function definitions
    - *.role.ts - Role definitions

  # Supported Folder Organizations

  ## Traditional (by type):
    src/app/
    ├── application.config.ts
    ├── objects/
    │   └── postCard.object.ts
    ├── functions/
    │   └── createPostCard.function.ts
    └── roles/
        └── admin.role.ts

  ## Feature-based:
    src/app/
    ├── application.config.ts
    └── post-card/
        ├── postCard.object.ts
        ├── createPostCard.function.ts
        └── postCardAdmin.role.ts

  ## Flat:
    src/app/
    ├── application.config.ts
    ├── postCard.object.ts
    ├── createPostCard.function.ts
    └── admin.role.ts

  # New Helper Functions

  ## defineApp(config)

    import { defineApp } from 'twenty-sdk';

    export default defineApp({
      universalIdentifier: '4ec0391d-...',
      displayName: 'My App',
      description: 'App description',
      icon: 'IconWorld',
    });

  ## defineObject(config)

    import { defineObject, FieldType } from 'twenty-sdk';

    export default defineObject({
      universalIdentifier: '54b589ca-...',
      nameSingular: 'postCard',
      namePlural: 'postCards',
      labelSingular: 'Post Card',
      labelPlural: 'Post Cards',
      icon: 'IconMail',
      fields: [
        {
          universalIdentifier: '58a0a314-...',
          type: FieldType.TEXT,
          name: 'content',
          label: 'Content',
        },
      ],
    });

  ## defineFunction(config)

    import { defineFunction } from 'twenty-sdk';
    import { myHandler } from '../utils/my-handler';

    export default defineFunction({
      universalIdentifier: 'e56d363b-...',
      name: 'My Function',
      handler: myHandler,
      triggers: [
        {
          universalIdentifier: 'c9f84c8d-...',
          type: 'route',
          path: '/my-route',
          httpMethod: 'POST',
        },
      ],
    });

  ## defineRole(config)

    import { defineRole, PermissionFlag } from 'twenty-sdk';

    export default defineRole({
      universalIdentifier: 'b648f87b-...',
      label: 'App User',
      objectPermissions: [
        {
          objectNameSingular: 'postCard',
          canReadObjectRecords: true,
        },
      ],
      permissionFlags: [PermissionFlag.UPLOAD_FILE],
    });

  # Test plan

    - Verify npx twenty app sync works with new folder structure
    - Verify npx twenty app dev works with new folder structure
    - Verify validation errors display correctly for invalid configs
- Verify all three folder organization styles work (traditional,
feature-based, flat)
    - Run existing E2E tests to ensure backward compatibility

yarn.lock

@@ -35924,7 +35924,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"fast-glob@npm:^3.0.3":
+"fast-glob@npm:^3.0.3, fast-glob@npm:^3.3.0":
   version: 3.3.3
   resolution: "fast-glob@npm:3.3.3"
   dependencies:
@@ -41815,6 +41815,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jiti@npm:^2.0.0":
+  version: 2.6.1
+  resolution: "jiti@npm:2.6.1"
+  bin:
+    jiti: lib/jiti-cli.mjs
+  checksum: 10c0/79b2e96a8e623f66c1b703b98ec1b8be4500e1d217e09b09e343471bbb9c105381b83edbb979d01cef18318cc45ce6e153571b6c83122170eefa531c64b6789b
+  languageName: node
+  linkType: hard
+
 "jju@npm:~1.4.0":
   version: 1.4.0
   resolution: "jju@npm:1.4.0"
@@ -56879,11 +56888,13 @@ __metadata:
     chokidar: "npm:^4.0.0"
     commander: "npm:^12.0.0"
     dotenv: "npm:^16.4.0"
+    fast-glob: "npm:^3.3.0"
     fs-extra: "npm:^11.2.0"
     graphql: "npm:^16.8.1"
     graphql-sse: "npm:^2.5.4"
     inquirer: "npm:^10.0.0"
     jest: "npm:^29.5.0"
+    jiti: "npm:^2.0.0"
     jsonc-parser: "npm:^3.2.0"
     lodash.camelcase: "npm:^4.3.0"
     lodash.capitalize: "npm:^4.2.1"