Add Beta branch for arduino 2.0

.gitignore

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+Build/
+.flatpak-builder/

arduino-ide.sh

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+#!/bin/bash
+
+FLAGS=''
+
+if [[ $XDG_SESSION_TYPE == "wayland" ]] && [ -c /dev/nvidia0 ]
+then
+    FLAGS="$FLAGS --disable-gpu-sandbox"
+fi
+
+# I cracked zypak's secrets
+export ZYPAK_SPAWN_LATEST_ON_REEXEC=0
+env TMPDIR=$XDG_CACHE_HOME zypak-wrapper /app/arduino-ide/arduino-ide /app/arduino-ide/resources/app/src-gen/frontend/electron-main.js $FLAGS "$@"

cc.arduino.arduinoide.appdata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+	<id>cc.arduino.arduinoide.desktop</id>
+	<metadata_license>CC-BY-SA-3.0</metadata_license>
+	<project_license>AGPL-3.0</project_license>
+	<name>Arduino IDE 2.x</name>
+	<summary>Open-source electronics prototyping platform</summary>
+    <developer_name>Arduino LLC</developer_name>
+    <description>
+        <p>
+            Arduino is an open-source electronics prototyping platform based
+            on flexible, easy-to-use hardware and software.  It's intended for
+            artists, designers, hobbyists, and anyone interested in creating
+            interactive objects or environments.
+        </p>
+        <p>
+            Included is an integrated development environment that can be used
+            to develop and upload code to compatible microcontrollers.
+        </p>
+		<p>
+			This is version 2 of the Arduino IDE. Version 2 is currently still in beta.
+		</p>
+    </description>
+
+	<releases>
+		<release version="2.0.0-rc6" date="2022-04-20">
+			<description>
+                		<ul>
+					<li>Updated to version 2 release candidate 6. github.com/arduino/arduino-ide/releases/tag/2.0.0-rc6</li>
+                		</ul>
+			</description>
+		</release>
+		<release version="2.0.0-rc5" date="2022-03-10">
+			<description>
+                		<ul>
+					<li>Updated to version 2 release candidate 5. github.com/arduino/arduino-ide/releases/tag/2.0.0-rc5</li>
+                		</ul>
+			</description>
+		</release>
+		<release version="2.0.0-rc4" date="2022-03-02">
+			<description>
+                		<ul>
+					<li>Updated to version 2 release candidate 4. github.com/arduino/arduino-ide/releases/tag/2.0.0-rc4</li>
+                		</ul>
+			</description>
+		</release>
+		<release version="2.0.0-rc3" date="2021-12-22">
+			<description>
+                		<ul>
+					<li>Updated to version 2 release candidate 3. github.com/arduino/arduino-ide/releases/tag/2.0.0-rc3</li>
+                		</ul>
+			</description>
+		</release>
+	</releases>
+
+	<screenshots>
+		<screenshot type="default">
+			<image>https://github.com/arduino/arduino-ide/raw/main/static/screenshot.png</image>
+			<caption>Image of Arduino IDE v2</caption>
+		</screenshot>
+	</screenshots>
+
+    <url type="homepage">http://www.arduino.cc/</url>
+    <url type="help">https://docs.arduino.cc/software/ide-v2</url>
+    <url type="bugtracker">https://github.com//arduino/arduino-ide/issues</url>
+    <url type="translate">https://github.com/arduino/arduino-ide/tree/main/i18n</url>
+    <url type="donation">https://www.arduino.cc/en/donate/</url>
+
+    <content_rating type="oars-1.0" />
+</component>

cc.arduino.arduinoide.desktop

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+[Desktop Entry]
+Name=Arduino IDE
+Exec=arduino-ide
+Icon=cc.arduino.arduinoide
+Comment=Arduino IDE v2 on Flathub
+Terminal=false
+Type=Application
+Categories=Development;IDE;Electronics;