Firefox Lockwise

Invalid date

Add the ability to manually create an entry. Improve error messaging for the user. Autofill footer now adjusts to dark mode.

Changes since last build:

- Update release process docs (#1143)
- Toast placement for copy, create, delete (#1166)

All changes since version 3.3.0:

- Import l10n: add EN-GB, UK, RU, ZH-RTW, CS (#1119)
- Manual create (#1093)
- Fixup autofill footer in dark mode. (#1115)
- Fixup edit regressions introduced during edit/create refactor (#1133)
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