extract package details header to its own directory

[abbiesims]

Done

• Extracts package details header into its own directory
• Groups all logic together to make this easier to move over to charmhub to align package headers
• No logic changes

How to QA

• Go to a few snaps in the demo and make sure the header looks the same as on prod

Testing

• This PR has tests
• No testing required (explain why): no change in logic

Security

• Security considerations for review (list them):
  • Examples:
  • Access control: users can only access their own data
  • Input: user input is validated and sanitised
  • Sensitive data: secret or private data is not exposed in any way
  • ...
• This PR has no security considerations (explain why): no change in logic

Issue / Card

Fixes WD-24035

UX Approval

• This PR does not require UX approval
• This PR does require UX approval (add context):

[webteam-app]

Demo

Jenkins

demos.haus

[Copilot]

Pull request overview

This PR refactors the Snap “package details” header templates by moving the header-related macros into a dedicated templates/store/package_header/ directory to keep the logic co-located and easier to reuse elsewhere (e.g. Charmhub), without intended behavior changes.

Changes:

• Updated store templates to import package_header from the new store/package_header/ location.
• Introduced a new templates/store/package_header/ directory containing the extracted header macros.
• Adjusted internal macro imports within the header components to use the new paths.

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
templates/store/snap-distro-install.html	Updates the package_header macro import path to the new directory.
templates/store/snap-details.html	Updates the package_header macro import path to the new directory.
templates/store/package_header/_package_header.html	New home for the package_header macro, now importing header helpers from the new directory.
templates/store/package_header/_package_header_data.html	Updates internal imports to reference the new package_header sub-macros.
templates/store/package_header/_developer_info.html	New extracted macro for rendering developer info with tooltip styling.
templates/store/package_header/_publisher_info.html	New extracted macro for rendering publisher info and validation badges.

[bartaz]

LGTM thanks