v0.9.1

@poupe/eslint-config v0.9.1

Migrate eslint-plugin-perfectionist from v4 to v5 and enable
nine additional recommended sorting rules. Consumers will see
a one-time eslint --fix churn as imports re-sort under the
new type- prefix selectors and as blank lines between export
groups are now preserved.

Changed:

• deps: eslint-plugin-perfectionist ^4.15.1 → ^5.8.0
• perfectionist: Migrated sort-imports to v5 format —
  groups from -type suffix to type- prefix selectors,
  'object' → 'ts-equals-import', added
  newlinesInside: 'newlinesBetween' (required by v5 when
  partitionByNewLine is enabled).
• perfectionist: Removed unused react/vue customGroups
  from sort-imports — they were defined but never referenced
  in the groups array, so they had no effect.
• perfectionist: Removed groupKind: 'mixed' from
  sort-named-imports and sort-named-exports (option removed
  in v5, mixed is the default behaviour).
• perfectionist: Enabled nine additional recommended rules
  with type: 'natural' sorting: sort-intersection-types
  (mirrors sort-union-types), sort-import-attributes,
  sort-export-attributes, sort-classes, sort-enums,
  sort-heritage-clauses, sort-interfaces,
  sort-object-types, sort-variable-declarations. Blank-line
  semantic grouping (partitionByNewLine) enabled on classes,
  enums, interfaces, object types, and variable declarations.

Fixed:

• perfectionist: Enabled partitionByNewLine for
  sort-exports and sort-named-exports — was only set on the
  import rules, causing blank lines between export groups to be
  collapsed by eslint --fix.

CI:

• build workflow: Added pull-requests: write permission so
  pkg-pr-new can post install comments on PRs.