fix: point backup policy upgrade link to enterprise contact page

[HarshMN2345]

Summary

• Pro plan users hitting the 1-policy backup limit were sent to the change-plan page, which only shows Free/Pro options — leaving them confused since they were already on Pro
• The "Upgrade your plan" links in createPolicy.svelte now point to https://appwrite.io/contact-us/enterprise and open in a new tab
• Text updated to "Upgrade to Enterprise" to clearly communicate what the upgrade path is
• Removed now-unused imports: goto, getChangePlanUrl, showCreatePolicy

Test plan

• On a Pro plan org, open the backup policies section for a database
• Verify the "Upgrade to Enterprise" link opens https://appwrite.io/contact-us/enterprise in a new tab
• Verify the same link appears in the database creation wizard backup step

[greptile-apps]

Greptile Summary

Pro plan users hitting the 1-policy backup limit were previously navigated to the change-plan page, which only shows Free/Pro options and left them stuck. This PR replaces both internal navigation handlers with external links to https://appwrite.io/contact-us/enterprise and updates the button text to "Upgrade to Enterprise".

• Both occurrences of the upgrade prompt (isFromBackupsTab branch and the InputSwitch description) now open the enterprise contact page in a new tab instead of routing within the app.
• Unused imports (goto, getChangePlanUrl, showCreatePolicy) are cleaned up correctly.

Confidence Score: 5/5

Safe to merge — minimal, well-scoped change that only affects the upgrade CTA links shown to Pro plan users in the backup policy UI.

The change is purely a UI link fix: two click handlers that navigated internally are replaced with external anchor targets, and three imports that became dead code are removed. No logic, state, or data flow is altered beyond what the PR intends.

No files require special attention.

Important Files Changed

Filename	Overview
src/routes/(console)/project-[region]-[project]/databases/database-[database]/backups/createPolicy.svelte	Replaces two on:click navigation handlers (which sent Pro users to the change-plan page) with direct external links to the enterprise contact page; removes now-unused goto, getChangePlanUrl, and showCreatePolicy imports.

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