fix(typo): correct spelling in comments and strings

[jannikbx]

Summary

Fixes 42 spelling errors in code comments, documentation and strings across the server codebase.

Changes

File	Correction
apps/appstore/src/composables/useAppIcon.ts	categroy → category
apps/appstore/src/service/app-discover.ts	useable → usable
apps/dav/lib/CalDAV/EventReader.php	evaludate → evaluate (5×), interation → iteration (4×)
apps/dav/lib/Command/ImportCalendar.php	writeable → writable (2×)
apps/dav/lib/Connector/Sabre/DavAclPlugin.php	writeable → writable
apps/files_sharing/src/components/SidebarTabExternal/SidebarTabExternalSection.vue	TOOD → TODO
apps/files_sharing/src/services/SharingService.spec.ts	exampe → example (2×)
apps/files_versions/src/components/VirtualScrolling.vue	wont → won't
apps/files_versions/tests/VersioningTest.php	secons → seconds (6×)
apps/theming/README.md	inbetween → in between, orginal → original (2×)
apps/theming/lib/Service/BackgroundService.php	whith → with
apps/theming/lib/Util.php	Calculat → Calculate
apps/theming/src/components/AdminSectionAppMenu.vue	wrapps → wraps
core/Service/LoginFlowV2Service.php	successfull → successful
core/src/OC/msg.ts	Displayes → Displays (6×)
core/src/ajax-cron.ts	successfull → successful
lib/private/Mail/Mailer.php	enforcable → enforceable
lib/private/Mail/Message.php	curently → currently, Adresses → Addresses, exsists → exists
lib/private/Mail/Provider/Manager.php	initilize → initialize (2×)
lib/private/Session/CryptoSessionData.php	Wheater → Whether
lib/public/IUserManager.php	whithin → within

All changes are limited to comments, documentation and strings only — no functional impact.

AI Assistance

This contribution was made with the help of DeepSeek V4 Pro and was reviewed by a human.

Assisted-by: DeepSeek:V4-Pro