Add response context support

[koertho]

This PR add custom response context bag for entries
It also adjust the way how entries injected in modern layouts due defered rendering.

[Copilot]

Pull request overview

Adds support for collecting encore entrypoints via Contao’s ResponseContext (with an EntryBag), and updates entry injection to work with deferred rendering in modern layouts.

Changes:

• Introduces HeimrichHannot\EncoreBundle\Request\ResponseContext\Entry + EntryBag and wires them into FrontendAsset/EntryPointsBuilder.
• Updates listeners (InjectPageEntriesListener, ReplaceDynamicScriptTagsListener) to use ResponseContextAccessor instead of FrontendAsset.
• Updates docs, twig collector template styling, phpstan baseline, and adds/adjusts tests for the new behavior.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/EventListener/InjectPageEntriesListenerTest.php	Adds coverage for deferred loading via response_context and “regular page” early return.
tests/EventListener/Contao/ReplaceDynamicScriptTagsListenerTest.php	Updates test to pass ResponseContext into the builder via ResponseContextAccessor.
tests/EntryPoint/EntryPointsBuilderTest.php	Migrates from FrontendAsset to ResponseContext/EntryBag and asserts new behavior.
tests/Asset/PageEntrypointsTest.php	Adapts test setup to new FrontendAsset(ResponseContextAccessor) constructor.
tests/Asset/FrontendAssetTest.php	Adds tests for behavior with/without a ResponseContext.
src/Request/ResponseContext/EntryBag.php	New container for response-context entry registrations.
src/Request/ResponseContext/Entry.php	New DTO for entry registrations (name/origin/extension).
src/EventListener/InjectPageEntriesListener.php	Implements deferred injection by wrapping response_context and triggering on end_of_head access.
src/EventListener/Contao/ReplaceDynamicScriptTagsListener.php	Switches to response context for building entrypoints.
src/EntryPoint/EntryPointsBuilder.php	Adds response-context and “custom bag” sources for building entrypoints.
src/EntryPoint/EntryPoint.php	Adds fromEntry() helper for converting Entry → EntryPoint.
src/Asset/FrontendAsset.php	Reworks active entrypoint tracking to store entries in ResponseContext (EntryBag).
phpstan-baseline.neon	Updates baseline counts for additional LayoutEvent accessors usage.
docs/developers/dynamic_entries.md	Documents the new response-context approach for registering entries.
docs/developers.md	Updates the “custom template” example to use response context/custom bag.
contao/templates/twig/data_collector/huh_encore.html.twig	Adjusts table cell styling in the data collector view.

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