UI: Linux setup experience - IT admin updates (#32569)

## PR 1/2 for #32037 

- Implements update for the Linux setup experience from the IT admin's
point of view. Updates for the end-user ("My device" page) to follow
- Works in concert with the new endpoints implemented in
https://github.com/fleetdm/fleet/pull/32493

- Splits Controls > Setup experience > Install software into 3 tabbed
sections, one for each of macOS, Windows (placeholder state for now, to
be implemented in following iteration), and Linux.
- Dynamically calls new GET and PUT endpoints and routes data
accordingly depending on which platform software for install is being
updated for.
- Update the software selection modal to display software package
versions, including the package type (deb, rpm, or tar) for Linux
software packges.
- New activity feed item
- Update relevant tests


![ezgif-86da6f2b97d770](https://github.com/user-attachments/assets/6ae95bb7-f629-472e-b996-fcba1cf83e76)
_Note that the lower-right-hand image in this GIF is outdated and will
be updated with new content once this entire feature is integrated_


~- [ ] Changes file added for user-visible changes in `changes/`~ will
include in PR 2/2
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually

- [x] Verified that any relevant UI is disabled when GitOps mode is
enabled

---------

Co-authored-by: Jacob Shandling <jacob@fleetdm.com>

frontend/interfaces/platform.ts

@@ -207,3 +207,11 @@ export const isOsSettingsDisplayPlatform = (
   }
   return OS_SETTINGS_DISPLAY_PLATFORMS.includes(platform);
 };
+
+export const SETUP_EXPERIENCE_PLATFORMS = [
+  "macos",
+  "windows",
+  "linux",
+] as const;
+
+export type SetupExperiencePlatform = typeof SETUP_EXPERIENCE_PLATFORMS[number];