Merge branch 'topic/flatpak' into 'master'

Add flatpak files.

See merge request eng/ide/gnatstudio!862

Author: reznikmm

distrib/flatpak/README.md

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+# Build flatpak
+
+* Place the distribution archive
+  (like `gnatstudio-25.1-x86_64-linux-bin.tar.gz`)
+  in this folder. Check the name of the distribution archive in the
+  `com.adacore.gnatstudio.json` file (`modules/sources/path` field).
+  Then run the packaging:
+
+  ```shell
+  flatpak-builder --force-clean --user --install-deps-from=flathub --repo=repo \
+    --install builddir com.adacore.gnatstudio.json
+  ```
+
+* Now you can launch it
+
+  ```shell
+  flatpak run --filesystem=/your/project/path \
+   --filesystem=/your/toolchain/path:ro \
+   --env=PATH=/app/bin:/usr/bin:/your/toolchain/bin \
+   com.adacore.gnatstudio
+  ```
+
+* You can build a bundle:
+
+  ```shell
+  flatpak build-bundle repo gnatstudio.flatpak com.adacore.gnatstudio \
+    --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo
+  ```
+
+* To uninstall it run:
+
+  ```shell
+  flatpak remove com.adacore.gnatstudio
+  ```

distrib/flatpak/com.adacore.gnatstudio.json

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+{
+  "id": "com.adacore.gnatstudio",
+  "runtime": "org.freedesktop.Platform",
+  "runtime-version": "23.08",
+  "sdk": "org.freedesktop.Sdk",
+  "command": "gnatstudio",
+  "modules": [
+    {
+      "name": "gnatstudio",
+      "buildsystem": "simple",
+      "build-commands": [
+        "./doinstall /app",
+        "ls -l /app",
+        "mkdir -v -p /app/share/metainfo/",
+        "mkdir -v -p /app/share/icons/hicolor/256x256/apps/",
+        "mkdir -v -p /app/share/applications/",
+        "cp -v com.adacore.gnatstudio.metainfo.xml /app/share/metainfo/",
+        "cp -v gnatstudio.png /app/share/icons/hicolor/256x256/apps/com.adacore.gnatstudio.png",
+        "cp -v gnatstudio.desktop /app/share/applications/com.adacore.gnatstudio.desktop"
+      ],
+      "sources": [
+        {
+          "type": "archive",
+          "path": "gnatstudio-25.1-x86_64-linux-bin.tar.gz"
+        },
+        {
+          "type": "file",
+          "path": "com.adacore.gnatstudio.metainfo.xml"
+        },
+        {
+          "type": "file",
+          "path": "gnatstudio.png"
+        },
+        {
+          "type": "file",
+          "path": "gnatstudio.desktop"
+        }
+      ]
+    }
+  ],
+  "finish-args": [
+    "--socket=wayland",
+    "--socket=fallback-x11",
+    "--share=ipc",
+    "--device=all",
+    "--filesystem=~/.gnatstudio"
+  ]
+}

distrib/flatpak/com.adacore.gnatstudio.metainfo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>com.adacore.gnatstudio</id>
+
+  <releases>
+    <release version="25.1" type="development" date="2025-01-09" />
+  </releases>
+
+  <name>GNAT Studio</name>
+  <summary>GNAT Studio is a powerful and lightweight IDE for Ada and SPARK</summary>
+  <url type="homepage">https://www.adacore.com/gnatpro/toolsuite/gnatstudio</url>
+  <url type="bugtracker">https://github.com/AdaCore/gnatstudio/issues</url>
+
+  <metadata_license>MIT</metadata_license>
+  <project_license>GPL-3.0-or-later</project_license>
+
+  <description>
+    <p>
+      GNAT Studio is a complete integrated development environment that gives access to a wide range of tools and integrates them smoothly.
+    </p>
+  </description>
+
+  <launchable type="desktop-id">com.adacore.gnatstudio.desktop</launchable>
+  <screenshots>
+    <screenshot type="default">
+      <caption>The GNAT Studio main window.</caption>
+      <image>https://docs.adacore.com/live/wave/gps/html/gps_ug/_images/gps-main-window.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>The Assembler View window.</caption>
+      <image>https://docs.adacore.com/live/wave/gps/html/gps_ug/_images/assembly.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>The Project Wizard window.</caption>
+      <image>https://docs.adacore.com/live/wave/gps/html/gps_ug/_images/project-wizard.png</image>
+    </screenshot>
+  </screenshots>
+
+  <icon type="stock">com.adacore.gnatstudio</icon>
+
+  <categories>
+    <category>Development</category>
+    <category>IDE</category>
+  </categories>
+
+  <provides>
+    <binary>gnatstudio</binary>
+  </provides>
+
+  <developer id="com.adacore">
+    <name>AdaCode</name>
+  </developer>
+
+  <content_rating type="oars-1.1" />  
+</component>

distrib/flatpak/gnatstudio.desktop

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+[Desktop Entry]
+Name=GNAT Studio
+Exec=gnatstudio
+Icon=com.adacore.gnatstudio
+Type=Application
+Categories=Development
+
+X-AppImage-Name=GNAT Studio
+X-AppImage-Version=25.1
+X-AppImage-Arch=x86_64
+