优化 data URI 支持

[Glavo]

No description provided.

[Copilot]

Pull Request Overview

This PR optimizes data URI support by restructuring the data URI handling code and integrating it with Java's URL stream handler system. The changes move data URI classes to a dedicated package, add proper URL stream handling, and integrate with Java's service provider interface.

• Reorganized data URI classes from util.io to dedicated util.url.data package
• Implemented URL stream handler for data URIs with proper URLConnection support
• Added service provider registration for custom URL stream handler

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
DataUriTest.java	Updated package declaration and import to reflect new package structure
URLStreamHandlerProvider	Added service provider registration for HMCL URL stream handler
DataUri.java	Moved to new package and added import for NetworkUtils
DataURLHandle.java	New URL stream handler implementation for data URIs
DataURLConnection.java	New URLConnection implementation for data URI content access
HMCLURLStreamHandlerProvider.java	New service provider for custom URL stream handlers

Comments suppressed due to low confidence (1)

[Copilot]

The getContentLength() method may return incorrect values when called before connect(). The data field is only initialized in connect(), so calling getContentLength() before connecting will always return -1 even if the data URI contains valid data.

Suggested change

	public int getContentLength() {
	public int getContentLength() {
	try {
	connect();
	} catch (IOException e) {
	return -1;
	}

[Copilot]

[nitpick] Consider using a more modern approach like a Map or if-else statement instead of switch for a single case. The current switch statement with only one case is unnecessarily verbose.

Suggested change

	switch (protocol) {
	case "data":
	return new DataURLHandle();
	if ("data".equals(protocol)) {
	return new DataURLHandle();