BREAKING CHANGE: WithPerTenantOptions replaced by ConfigurePerTenant service collection extensions methods.

Added support for `OptionsBuilder` API and more efficient per-tenant options overall.

BREAKING CHANGE: (I)MultiTenantContext and (I)TenantInfo are no longer available via DI. Use IMultiTenantContextAccessor instead. Also IMultiTenantContext nullability reworked and should never be null.

…ey behavior

BREAKING CHANGE: all unique indexes and the UserLogin primary key in the standard Identity models are adjusted to include the tenant id

…or IMultiTenantContextAccessor DI

BREAKING CHANGE: Connection string is removed because in many cases it is not needed. Closes #624

BREAKING CHANGE: Many namespaces have been updated for consistency. Most code will only need to reference the `Finbuckle.MultiTenant` namespace.

## [7.0.0](v6.13.1...v7.0.0) (2024-04-21)

### ⚠ BREAKING CHANGES

* Many namespaces have been updated for consistency. Most code will only need to reference the `Finbuckle.MultiTenant` namespace.
* Connection string is removed because in many cases it is not needed. Closes #624
* all unique indexes and the UserLogin primary key in the standard Identity models are adjusted to include the tenant id
* (I)MultiTenantContext and (I)TenantInfo are no longer available via DI. Use IMultiTenantContextAccessor instead. Also IMultiTenantContext nullability reworked and should never be null.
* WithPerTenantOptions replaced by ConfigurePerTenant service collection extensions methods.

Added support for `OptionsBuilder` API and more efficient per-tenant options overall.

### Features

* better options support ([#681](#681)) ([1859017](1859017))
* change default MultiTenantIdentityDbContext default index and key behavior ([81f5612](81f5612))
* MultiTenantDbContext and MultiTenantIdentityDbContext support for IMultiTenantContextAccessor DI ([9015085](9015085))
* namespace cleaned up ([b354838](b354838))
* refactor DI and improve nullability ([eca24bf](eca24bf))
* remove ConnectionString from ITenantInfo and TenantInfo ([f4e20db](f4e20db))

### Bug Fixes

* AdjustKey correctly adding TenantId to primary and foreign keys ([613b4a8](613b4a8))