[BREAKING_CHANGE] Deprecate remaining entities standardId (#17639)

# Introduction
Following https://github.com/twentyhq/twenty/pull/17632 and
https://github.com/twentyhq/twenty/pull/17572
This PR deprecates the agent, skill, field metadata and role
`standardId` in favor of the `universalIdentifier` usage

## Note
- Removed previous standard ids declaration modules
- Twenty-sdk now re-exports the `STANDARD_OBJECTS` universalIdentifier
hashmap constant
- deleted some sync-metadata deadcode too ( mainly types )

packages/twenty-server/src/engine/metadata-modules/skill/dtos/skill.dto.ts

@@ -17,9 +17,6 @@ export class SkillDTO {
   @Field(() => UUIDScalarType)
   id: string;
 
-  @Field(() => UUIDScalarType, { nullable: true })
-  standardId?: string | null;
-
   @IsString()
   @Field()
   name: string;

packages/twenty-server/src/engine/metadata-modules/skill/entities/skill.entity.ts

@@ -22,9 +22,6 @@ export class SkillEntity
   @PrimaryGeneratedColumn('uuid')
   id: string;
 
-  @Column({ nullable: true, type: 'uuid' })
-  standardId: string | null;
-
   @Column({ nullable: false })
   name: string;