misc(ci): Add build GitHub actions workflow

.github/workflows/build.yml

@@ -0,0 +1,19 @@
+name: Build
+on: [push, pull_request]
+env:
+  buildDir: ${{ github.workspace }}/build/
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '13.1'
+      - name: Build
+        run: |
+          gem install --verbose xcpretty
+          set -o pipefail && xcodebuild -UseModernBuildSystem=NO -configuration Release -target "Mumble" CONFIGURATION_BUILD_DIR="${PWD}/__build__" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -sdk iphoneos | xcpretty

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "MumbleKit"]
 	path = MumbleKit
-	url = http://github.com/mumble-voip/mumblekit.git
+	url = https://github.com/mumble-voip/mumblekit.git
 [submodule "Dependencies/fmdb"]
 	path = Dependencies/fmdb
-	url = http://github.com/ccgus/fmdb.git
+	url = https://github.com/ccgus/fmdb.git

BuildConfig/Base.xcconfig

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-ARCHS = armv7 arm64
+ARCHS = arm64
 SDKROOT = iphoneos
 
 MACOSX_DEPLOYMENT_TARGET = 10.7