feat: upgrade ios sdk to 11.0.0 and remove cocoapods integration

[illuminati1911]

• Migrate iOS plugin integration from CocoaPods to Swift Package Manager only.
  • Remove podspec, Podfile, Pods project settings, CI caches, and CocoaPods documentation/configuration.
• Upgrade iOS Navigation SDK to 11.0.0.
• Raise minimum Flutter version and update Patrol/permission-handler dependencies for SPM compatibility.
• Update iOS SDK 11.0.0 behavior:
  • Traffic-light and stop-sign display settings are no-ops on iOS and documented as Android-only
  • Document iOS terrain limitation during active navigation
  • Add motion usage descriptions and setup guidance
  • Document Xcode 26+ contributor requirement.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation
• I added new tests to check the change I am making
• All existing and new tests are passing.

[jokerttu]

LGTM