Release 4.0.0 Changelog and version bump

[come-nc]

Merged PRs since 3.0.0:

• feat: 32-bit support #408
• Reschedule to sunday morning again #407
• [main] Update nextcloud/ocp dependency #412
• [main] Update nextcloud/ocp dependency #406
• Fix update-nextcloud-ocp to branch being named main and not master #405
• Bump major dev version #403
• feat(cli)!: Export to final destination directly #402
• Document occ commands #386
• chore: Add Nextcloud 27 support on main #372
• Chore(deps): Bump @nextcloud/vue from 7.11.3 to 7.11.4 #415
• Chore(deps): Bump @nextcloud/vue from 7.10.0 to 7.11.3 #414
• Chore(deps-dev): Bump @nextcloud/webpack-vue-config from 5.5.0 to 5.5.1 #404
• Chore(deps): Bump @nextcloud/vue from 7.9.0 to 7.10.0 #399
• Chore(deps): Bump @nextcloud/router from 2.0.1 to 2.1.1 #400
• bump @nextcloud/vue from 7.8.5 to 7.9.0 #391
• Chore(deps): Bump @nextcloud/vue from 7.8.4 to 7.8.5 #387
• Chore(deps-dev): Bump @nextcloud/webpack-vue-config from 5.4.0 to 5.5.0 #381
• Chore(deps): Bump @nextcloud/vue from 7.7.1 to 7.8.4 #383
• Chore(deps): Bump webpack from 5.74.0 to 5.76.1 #380
• Chore(deps-dev): Bump phpunit/phpunit from 9.6.7 to 9.6.8 #416
• Chore(deps-dev): Bump vimeo/psalm from 5.9.0 to 5.11.0 #409
• Chore(deps-dev): Bump nextcloud/coding-standard from 1.0.0 to 1.1.0 #396
• Chore(deps-dev): Bump phpunit/phpunit from 9.6.6 to 9.6.7 #395
• Chore(deps-dev): Bump doctrine/dbal from 3.6.1 to 3.6.2 #394
• Chore(deps-dev): Bump vimeo/psalm from 5.8.0 to 5.9.0 #389
• Chore(deps-dev): Bump phpunit/phpunit from 9.6.5 to 9.6.6 #388
• Chore(deps-dev): Bump vimeo/psalm from 5.7.7 to 5.8.0 #378
• Chore(deps-dev): Bump phpunit/phpunit from 9.6.4 to 9.6.5 #377
• Chore(deps-dev): Bump phpunit/phpunit from 9.6.3 to 9.6.4 #376
• Chore(deps-dev): Bump doctrine/dbal from 3.6.0 to 3.6.1 #375

Todo:

• Tag v4.0.0 on this repository
• Create the release on this repository
• Push the tag to the nextcloud-releases repository
• Create the release there