chore(move): useDelayedFlag to composables

[max-nextcloud]

We keep composables in the src/composables folder now.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.51%. Comparing base (f72ed43) to head (af3e23b).
⚠️ Report is 26 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #7579 +/- ##
=======================================
Coverage 53.51% 53.51% =======================================
Files 502 502 Lines 43509 43509 Branches 1131 1131 =======================================
Hits 23282 23282 Misses 20118 20118 Partials 109 109 

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