fix: remove remaining per-resource Usage tabs and shortcuts

[HarshMN2345]

Summary

• Removes the per-bucket, per-function, per-site, and Auth-section Usage tabs/routes, matching the same cleanup already done for databases (fix(databases): remove leftover top-level Usage tab #3128, fix(databases): remove leftover per-table Usage tab #3130, fix(databases): remove leftover per-database Usage tab #3131).
• Also removes the dangling g u command-center shortcuts in each area's +layout.svelte, and a leftover "Go to usage" entry in the functions command-palette searcher.
• Project-level billing usage (settings/usage) is untouched — separate feature.

Test plan

• bun run check passes with no new errors
• Bucket, function, site, and auth pages no longer show a Usage tab or g u shortcut

[appwrite]

Console (appwrite/console)

Project ID: 688b7bf400350cbd60e9

Sites (1)

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console-stage 688b7cf6003b1842c9dc	Processing	View Logs	Preview URL

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[greptile-apps]

Greptile Summary

This PR removes the remaining per-resource Usage pages and entry points. The main changes are:

• Deleted Auth, Function, Site, and Storage per-resource usage routes.
• Removed Auth and Function Usage header tabs.
• Removed g u shortcuts for the deleted per-resource usage pages.
• Removed the Function command-palette search result for Usage.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.
• Removed navigation entries point to routes that were deleted in the same change.
• Remaining Usage routes are for Settings and Databases, which are outside this cleanup.

Important Files Changed

Filename	Overview
src/lib/commandCenter/searchers/functions.ts	Removes the Function search result that navigated to the deleted usage route.
src/routes/(console)/project-[region]-[project]/auth/+layout.svelte	Removes the Auth g u command that navigated to the deleted usage route.
src/routes/(console)/project-[region]-[project]/auth/header.svelte	Removes the Auth Usage tab from the header navigation.
src/routes/(console)/project-[region]-[project]/auth/usage/[[period]]/+page.svelte	Deletes the Auth usage page component.
src/routes/(console)/project-[region]-[project]/auth/usage/[[period]]/+page.ts	Deletes the Auth usage load function.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/+layout.svelte	Removes the Function g u command that navigated to the deleted usage route.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/header.svelte	Removes the Function Usage tab from the header navigation.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/usage/[[period]]/+page.svelte	Deletes the Function usage page component.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/usage/[[period]]/+page.ts	Deletes the Function usage load function.
src/routes/(console)/project-[region]-[project]/sites/site-[site]/deployments/+layout.svelte	Removes the Site deployments g u command that navigated to the deleted usage route.
src/routes/(console)/project-[region]-[project]/sites/site-[site]/usage/[[period]]/+page.svelte	Deletes the empty Site usage page component.
src/routes/(console)/project-[region]-[project]/sites/site-[site]/usage/[[period]]/+page.ts	Deletes the empty Site usage load function.
src/routes/(console)/project-[region]-[project]/storage/bucket-[bucket]/+layout.svelte	Removes the Storage bucket g u command that navigated to the deleted usage route.
src/routes/(console)/project-[region]-[project]/storage/bucket-[bucket]/usage/[[period]]/+page.svelte	Deletes the empty Storage bucket usage page component.
src/routes/(console)/project-[region]-[project]/storage/bucket-[bucket]/usage/[[period]]/+page.ts	Deletes the empty Storage bucket usage load function.

_{Reviews (1): Last reviewed commit: "fix: remove remaining per-resource Usage..." | Re-trigger Greptile}

[HarshMN2345]

Superseded by #3134 — consolidating everything into a single PR.