fix: align AutoFill keychain-access-group with main app, lowercase bundle IDs

Root-caused the "MyPass doesn't appear in Settings > AutoFill Passwords"
issue: entitlements embed correctly on a real device build but are
silently stripped to empty on every Simulator build in this
environment (confirmed identically via CLI xcodebuild and Xcode's own
GUI build/run, before and after multiple rounds of removing/re-adding
capabilities in Signing & Capabilities). This is a Simulator/SDK-level
limitation in this environment, not a project misconfiguration --
verified by comparing against a real iphoneos device build, which
embeds the full App Group / Keychain Sharing / AutoFill Credential
Provider entitlements correctly.

While diagnosing, found and fixed a real, separate bug: AutoFill's
Keychain Sharing group had been set (via Xcode's capability re-add
flow, which defaults to the target's own bundle ID) to
org.antiloop222.mypass.autofill, while the main app uses
org.antiloop222.mypass -- a mismatch that would have prevented the
extension from ever reading the shared master password from Keychain,
even on a real device where entitlements embed correctly. Now aligned
to org.antiloop222.mypass on both targets, matching what
KeychainStore's hardcoded accessGroup expects in both AutoFill/
CredentialProviderViewController.swift and MyPass/ViewModels/
UnlockViewModel.swift.

Also includes the user's own Signing & Capabilities re-add (repopulated
App Group selections) and a bundle-identifier lowercase normalization
(org.antiloop222.MyPass -> org.antiloop222.mypass, matching the
already-lowercase App Group/Keychain group strings) made via Xcode's
GUI.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WYqycDFsynHH9VnnK7LNSf

AutoFill/AutoFill.entitlements

@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
-    <dict>
-        <key>com.apple.developer.authentication-services.autofill-credential-provider</key>
-        <true/>
-        <key>com.apple.security.application-groups</key>
-        <array>
-            <string>group.org.antiloop222.mypass</string>
-        </array>
-        <key>keychain-access-groups</key>
-        <array>
-            <string>$(AppIdentifierPrefix)org.antiloop222.mypass</string>
-        </array>
-    </dict>
+<dict>
+	<key>com.apple.developer.authentication-services.autofill-credential-provider</key>
+	<true/>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.org.antiloop222.mypass</string>
+	</array>
+	<key>keychain-access-groups</key>
+	<array>
+		<string>$(AppIdentifierPrefix)org.antiloop222.mypass</string>
+	</array>
+</dict>
 </plist>