renderer: refactor to resolve the stencil buffer issues

[yorkie]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the renderer’s context storage and debugging infrastructure to address stencil buffer issues and unify host/app GL context handling, while also exposing new runtime statistics via the inspector.

• Introduce new ContextGLHost/ContextGLApp classes and rename storage methods (on*) to replace legacy context storage.
• Add iterateContentRenderers API and extend inspector with a /json/statistics endpoint.
• Add framebuffer‐attachment helpers, update debug output (including stencil state), and adjust project build/configuration files.

Reviewed Changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/runtime/inspector.hpp	Declare new getStatistics method
src/runtime/inspector.cpp	Implement statistics route and JSON output
src/runtime/embedder.cpp	Fix perfFs field access
src/renderer/renderer.hpp	Rename OpenGL context type, add iterateContentRenderers
src/renderer/renderer.cpp	Update context usage, implement iterateContentRenderers
src/renderer/render_api_opengles.cpp	Rename context methods, add stencil state debug output
src/renderer/gles/context_storage.hpp	Refactor storage API, rename classes and methods
src/renderer/gles/context_storage.cpp	Update record/restore implementations
src/renderer/gles/context_host.hpp	Add host context class
src/renderer/gles/context_host.cpp	Implement host context record/restore and framebuffer tracking
src/renderer/gles/context_app.hpp	Add app context class
src/renderer/gles/context_app.cpp	Implement app context lifecycle callbacks
src/renderer/gles/framebuffer_attachment.hpp	New framebuffer-attachment helper
src/renderer/gles/framebuffer.hpp	New GLFramebuffer wrapper
src/renderer/gles/framebuffer.cpp	Implement wrapper methods
src/renderer/gles/common.hpp	Add texture-target string and include updates
src/renderer/gles/common.cpp	Implement glTextureTargetToString, extend internal-format strings
src/renderer/content_renderer.hpp	Update context type, add frame timing fields
src/renderer/content_renderer.cpp	Refactor backup context, frame execution logic
src/examples/desktop_opengl.cpp	Update OpenGL version/context hints and flags
src/common/debug.hpp	Add performance counter macro definitions
src/common/classes.hpp	Forward-declare TrInspector
src/client/builtin_scene/texture_altas.cpp	Switch to texStorage3D, update atlas initialization
makefile	Remove unused release-flag override
build/configure.sh	Enable CMAKE_EXPORT_COMPILE_COMMANDS
.vscode/c_cpp_properties.json	Add Android IntelliSense configuration