[Customer Center] Hack week: add contact support button to customer center

[ekurutepe]

Checklist

• [ ] If applicable, unit tests
• [ ] If applicable, create follow-up issues for purchases-android and hybrids

Motivation

It seems like we have the ability to open system email client to contact support but we were not surfacing this for the users. See the discussion: https://revenuecat.slack.com/archives/C072SLPSTQS/p1736178563670389

Description

Adds a user tappable ContactSupportButton to customer center at the top level for all purchase states.

[RevenueCat-Danger-Bot]

	1 Error
:no_entry_sign:	The PR is tagged with pr:RevenueCatUI only. Please add another appropriate label.

Label	Description
pr:feat	A new feature. Use along with pr:breaking to force a major release.
pr:fix	A bug fix. Use along with pr:force_minor to force a minor release.
pr:other	Other changes. Catch-all for anything that doesn't fit the above categories. Releases that only contain this label will not be released. Use along with pr:force_patch, or pr:force_minor to force a patch or minor release.
pr:RevenueCatUI	Use along any other tag to mark a PR that only contains RevenueCatUI changes
pr:next_release	Preparing a new release
pr:dependencies	Updating a dependency
pr:phc_dependencies	Updating purchases-hybrid-common dependency

Generated by :no_entry_sign: Danger

[aboedo]

@ekurutepe I'm ridiculously late to this one but I think backend-driven is probably the longer-term solution. Are we good to close this one out until we get to build this backend-side?

[ekurutepe]

@ekurutepe I'm ridiculously late to this one but I think backend-driven is probably the longer-term solution. Are we good to close this one out until we get to build this backend-side?

oops, this is an abandoned PR. Sorry for wasting your time @aboedo.