PLATUI-2942: Upgrade library to govuk-frontend v5.3.0

docs/maintainers/adr/0021-exclude-password-field.md

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+# Defer Inclusion of Password Field from govuk-frontend v5.3.0
+
+* Status: accepted
+* Date: 2024-08-04
+
+## Context and Problem Statement
+
+With the release of govuk-frontend v5.3.0, which includes a password field, we are considering whether to integrate this feature into our frontend library. Given that authentication for most services is handled by a central service (e.g., GG or the upcoming OLFG), the need for a library component for password fields may not be widespread. There are also considerations around the engineering cost of creating and maintaining such a component.
+
+## Decision Drivers
+
+* Centralized authentication services reducing the need for a password field component
+* Engineering cost of maintenance and development
+* Potential future demand for this component
+
+## Considered Options
+
+* Immediately include the password field feature from govuk-frontend v5.3.0
+* Defer the inclusion of the password field feature until there is a demonstrated need
+
+## Decision Outcome
+
+Chosen option: "Defer the inclusion of the password field feature until there is a demonstrated need", because it allows us to focus on components with a clear demand and reduces the maintenance burden. This decision is reversible, and we remain open to revisiting it should a significant need for this component arise from our services.
+
+### Positive Consequences
+
+* Keeps the library focused on widely used components
+* Reduces unnecessary maintenance and development work
+* Flexible approach that can adapt to future demands
+
+### Negative Consequences
+
+* Teams needing the password field immediately may have to implement their own solutions
+
+## Pros and Cons of the Options
+
+### Immediately include the password field feature
+
+* Good, because it provides immediate feature completeness.
+* Bad, because it likely adds an unused feature for most teams, increasing maintenance overhead.
+
+### Defer the inclusion of the password field feature
+
+* Good, because it aligns our resources with current needs and reduces overhead.
+* Good, because it leaves room to adapt based on future demand.
+* Bad, because teams with immediate needs must find alternative solutions.
+
+## Links
+
+* [govuk-frontend v5.3.0 Release Notes](https://github.com/alphagov/govuk-frontend/releases/tag/v5.3.0)