…8900)

* feat: add constraintName to JoinColumn

Add a constraintName to JoinColumn decorators to allow specifying foreignKey name.
Use constraintName when building JoinTable entities as well.

Partially solves: #1355

* test: add tests for constraintNames on JoinColumn

* docs: add constraintName documentation to JoinColumn and JoinTable

* test: update snapshot in 5444 test

Add constraintName property with correct variable undefined to snapshot in tests for issue 5444.

* prettier

* added support for custom FK name in Sqlite;
added test;

* removed .only

* fixed FK constraint renaming on table/column rename

* minor fix

* fixed @unique and @Index constraints renaming on table/column rename

* working on constraint name support for PK

* replaced `constraintName` with `primaryKeyConstraintName` and `foreignKeyConstraintName`

* fixed failing test

* working on constraint name support for PK

* updated docs

Co-authored-by: Matthijs Hatzmann <matthijs.hatzmann@tradecast.eu>