fix: update PostHog to 3.62.0 to fix SwiftDriver compilation error

- Pin PostHog to 3.62.0 (vendored PLCrashReporter, drops external
  plcrashreporter dependency that fails with Xcode 26/Swift 6)
- Update project.yml and pbxproj minimumVersion
- Delete Package.resolved to force clean SPM resolution
- Add -resolvePackageDependencies step in CI workflow
- Add -skipPackagePluginValidation to build command
- Fix docs/ci-cd-setup.md manual build command

.gitea/workflows/pr-iphone-deploy.yml

@@ -46,6 +46,11 @@ jobs:
           cd tabatago-swift
           xcodegen generate
 
+      - name: Resolve SPM packages
+        run: |
+          cd tabatago-swift
+          xcodebuild -resolvePackageDependencies -project TabataGo.xcodeproj -scmProvider system
+
       - name: Build app
         run: |
           cd tabatago-swift
@@ -57,6 +62,7 @@ jobs:
             -destination "generic/platform=iOS" \
             -configuration Debug \
             -allowProvisioningUpdates \
+            -skipPackagePluginValidation \
             CODE_SIGN_STYLE=Automatic DEVELOPMENT_TEAM=2MJF39L8VY
 
       - name: Package IPA