feat: allow explicitly named primary keys, foreign keys, and indices

[AlexMesser]

Description of change

Includes changes from #8524, fixes issues with existing custom constraint names (indices, uniques) and adds support for custom primary key constraint names.

Custom FK names:

@Entity()
export class Post {
    @ManyToOne((type) => Category)
    @JoinColumn({
        name: "cat_id",
        referencedColumnName: "name",
        foreignKeyConstraintName: "fk_cat_id"
    })
    category: Category
}

@Entity()
export class Post {
    @ManyToMany((type) => Category)
    @JoinTable({
        name: "question_categories",
        joinColumn: {
            name: "question",
            referencedColumnName: "id",
            foreignKeyConstraintName: "fk_question_categories_questionId"
        },
        inverseJoinColumn: {
            name: "category",
            referencedColumnName: "id",
            foreignKeyConstraintName: "fk_question_categories_categoryId"
        },
    })
    categories: Category[]
}

Custom PK names:

@Entity()
export class User {
    @PrimaryColumn({ primaryKeyConstraintName: "pk_user_id" })
    id: number
}

@Entity()
export class User {
    @Column({ primary: true, primaryKeyConstraintName: "pk_user_id" })
    id: number
}

@Entity()
export class User {
    @PrimaryGeneratedColumn({ primaryKeyConstraintName: "pk_user_id" })
    id: number
}

Fixes #1355
Fixes #4572
Fixes #8321

Closes #8524

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply prettier formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions explained in CONTRIBUTING.md

[EPecherkin]

Beautiful

[rstoughton]

This would be huge for my team's current migration. Much love ❤️

[eporomaa]

Much appreciated!

[jeniasaigak]

Is there a way to pass primaryKeyConstraintName using EntitySchema?

export const UserSchema = new EntitySchema({
  name: 'User',
  columns: {
    id: {
      primary: true,
      type: 'uuid',
      // primaryKeyConstraintName: 'PK_user_id', // <--- There is no such key 😔
    },
  },
});

Thanks in advance!

[jeniasaigak]

Is there a way to pass primaryKeyConstraintName using EntitySchema?

export const UserSchema = new EntitySchema({
  name: 'User',
  columns: {
    id: {
      primary: true,
      type: 'uuid',
      // primaryKeyConstraintName: 'PK_user_id', // <--- There is no such key 😔
    },
  },
});

Thanks in advance!

Should be resolved at #9309
Thanks, @AlexMesser 🙏