buildsystem: Move to meson for building the project

Meson will allow us to:
- Verify the used rust compiler is recent enough
- Install ressources such as a .desktop files, icons, etc.

src/meson.build

@@ -0,0 +1,31 @@
+rust_sources = files(
+  'application.rs',
+  'main.rs',
+  'pipewire_connection.rs',
+  'pipewire_connection/state.rs',
+  'view/graph_view.rs',
+  'view/mod.rs',
+  'view/node.rs',
+  'view/port.rs',
+)
+
+custom_target(
+  'cargo-build',
+  build_by_default: true,
+  input: [
+    cargo_sources,
+    rust_sources
+  ],
+  output: meson.project_name(),
+  console: true,
+  install: true,
+  install_dir: bindir,
+  command: [
+    cargo_script,
+    meson.build_root(),
+    meson.source_root(),
+    '@OUTPUT@',
+    get_option('profile'),
+    meson.project_name(),
+  ],
+)