Devcontainer: Add a Fedora 41 devcontainer for use in CI

.devcontainer/features/ladybird/install-fedora.sh

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+#!/bin/sh
+set -e
+
+# Git and GitHub CLI
+dnf install -y git gh
+
+# Ladybird dev dependencies
+dnf install -y autoconf-archive automake ccache cmake curl google-noto-sans-mono-fonts liberation-sans-fonts libglvnd-devel \
+    nasm ninja-build perl-FindBin perl-IPC-Cmd perl-lib qt6-qtbase-devel qt6-qtmultimedia-devel qt6-qttools-devel \
+    qt6-qtwayland-devel tar unzip zip zlib-ng-compat-static

.devcontainer/fedora-ci/Dockerfile

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+ARG VERSION=41
+FROM fedora:${VERSION}

.devcontainer/fedora-ci/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json.
+{
+	"name": "Fedora CI",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"build": {
+		"context": ".",
+		"dockerfile": "Dockerfile",
+		"args": {
+			"VERSION": "${localEnv:VERSION}"
+		}
+	},
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	"features": {
+		"ghcr.io/devcontainers/features/common-utils:2": {},
+		"../features/ladybird" : {
+			"distro": "fedora"
+		}
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "uname -a",
+
+	// Configure tool-specific properties.
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	"remoteUser": "vscode"
+}