chore: update macOS icons and add build script

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

scripts/build-macos.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+git apply ./scripts/enable-android-google-services.patch
+FLUFFYCHAT_ORIG_GROUP="im.fluffychat"
+FLUFFYCHAT_ORIG_TEAM="4NXF6Z997G"
+#FLUFFYCHAT_NEW_GROUP="com.example.fluffychat"
+#FLUFFYCHAT_NEW_TEAM="ABCDE12345"
+
+# In some cases (ie: running beta XCode releases) some pods haven't updated their minimum version
+# but XCode will reject the package for using too old of a minimum version. 
+# This will fix that, but. Well. Use at your own risk.
+# export I_PROMISE_IM_REALLY_SMART=1
+
+# If you want to automatically install the app
+# export FLUFFYCHAT_INSTALL_IPA=1
+
+### Rotate IDs ###
+[ -n "${FLUFFYCHAT_NEW_GROUP}" ] && {
+	# App group IDs
+	sed -i "" "s/group.${FLUFFYCHAT_ORIG_GROUP}.app/group.${FLUFFYCHAT_NEW_GROUP}.app/g" "macos/Runner/Runner.entitlements"
+	sed -i "" "s/group.${FLUFFYCHAT_ORIG_GROUP}.app/group.${FLUFFYCHAT_NEW_GROUP}.app/g" "macos/Runner.xcodeproj/project.pbxproj"
+	# Bundle identifiers
+	sed -i "" "s/${FLUFFYCHAT_ORIG_GROUP}.app/${FLUFFYCHAT_NEW_GROUP}.app/g" "macos/Runner.xcodeproj/project.pbxproj"
+}
+
+[ -n "${FLUFFYCHAT_NEW_TEAM}" ] && {
+	# Code signing team
+	sed -i "" "s/${FLUFFYCHAT_ORIG_TEAM}/${FLUFFYCHAT_NEW_TEAM}/g" "macos/Runner.xcodeproj/project.pbxproj"
+}
+
+### Make release build ###
+flutter build macos --release
+
+cp /usr/local/Cellar/libolm/**/lib/libolm.3.dylib build/macos/Build/Products/Release/FluffyChat.app/Contents/MacOS/libolm.3.dylib

scripts/prepare-macos.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+if ! type "flutter" > /dev/null; then
+	brew install flutter
+fi
+
+brew install libolm
+