fix: escape multiline classloader names in view

[skt-shinyruo]

Summary

• escape CR/LF/TAB in classloader display text before rendering
• apply the normalization across classloader table/tree and related headers
• add regression coverage for the affected render paths

Test Plan

• mvn -f core/pom.xml -Dtest=ClassLoaderViewTest test

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Pull request overview

This PR hardens Arthas’ classloader rendering so classloader names containing control characters (CR/LF/TAB) don’t break table/tree output, and adds regression coverage for the main render paths.

Changes:

• Introduce ClassUtils.formatClassLoaderText to normalize CR/LF into a literal \n and TAB into spaces.
• Apply normalization to classloader display in ClassLoaderView (table/tree + section headers) and TypeRenderUtils.drawClassLoader (class detail views).
• Add ClassLoaderViewTest coverage for multiple render entry points.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
core/src/test/java/com/taobao/arthas/core/command/view/ClassLoaderViewTest.java	Adds regression tests asserting escaped rendering for table/tree/class-detail and headers.
core/src/main/java/com/taobao/arthas/core/util/TypeRenderUtils.java	Normalizes classloader strings before building the classloader tree element.
core/src/main/java/com/taobao/arthas/core/util/ClassUtils.java	Adds formatClassLoaderText helper for CR/LF/TAB normalization.
core/src/main/java/com/taobao/arthas/core/command/view/ClassLoaderView.java	Applies normalization to classloader names/parents in table/tree and related headers.

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