chore: privatize pal and platforms

[qiuguohua]

Re: #

Changelog

---

Continuous Integration

This pull request:

• needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• does not change any runtime related code or build configuration

  If any reviewer thinks the CI checks are needed, please uncheck this option, then close and reopen the issue.

---

Compatibility Check

This pull request:

• changes public API, and have ensured backward compatibility with deprecated features.
• affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• affects file structure of the build package or build configuration which requires user project upgrade.
• introduces breaking changes, please list all changes, affected features and the scope of violation.

[greptile-apps]

Too many files changed for review (368 files, 100 file limit).

Bypass the limit by tagging @greptile-apps to review.

[github-actions]

Code Size Check Report

Wechat (WASM)	Before	After	Diff
2D Empty (legacy pipeline)	1009972 bytes	1010166 bytes	⚠️ +194 bytes
2D All (legacy pipeline)	2676439 bytes	2676639 bytes	⚠️ +200 bytes
2D All (new pipeline)	2768175 bytes	2768377 bytes	⚠️ +202 bytes
(2D + 3D) All	10025363 bytes	10025563 bytes	⚠️ +200 bytes

Web (WASM + ASMJS)	Before	After	Diff
(2D + 3D) All	16845507 bytes	16845565 bytes	⚠️ +58 bytes

Interface Check Report

! WARNING this pull request has changed these public interfaces:

@@ -66054,8 +66054,9 @@
         export enum _pal_system_info_enum_type_platform__Platform {
             UNKNOWN = "UNKNOWN",
             EDITOR_PAGE = "EDITOR_PAGE",
             EDITOR_CORE = "EDITOR_CORE",
+            NODEJS_PAGE = "NODEJS_PAGE",
             MOBILE_BROWSER = "MOBILE_BROWSER",
             DESKTOP_BROWSER = "DESKTOP_BROWSER",
             WIN32 = "WIN32",
             ANDROID = "ANDROID",

[qiuguohua]

@cocos-robot run test cases

[github-actions]

@qiuguohua, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.9
• Task Result: RUNNING
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/38799f7d-71b4-4bc9-aa4c-ed7b3be669f1/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/34833357284

Task Details

[github-actions]

@qiuguohua, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.9
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/1f63e348-acb3-4650-94d9-e0145f139c3e/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/34833357284

Task Details

[qiuguohua]

@cocos-robot run test cases

[github-actions]

@qiuguohua, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.9
• Task Result: FAIL
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/bdb99a91-dbd4-4fac-89a6-9d4b1569d084/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/35331285152

Task Details

Platform	build	boot	runned	crashScene	FailScene
web-mobile	PASS	PASS	FAIL		graphics-continuous-filling
ios	PASS	PASS	PASS
mac	PASS	PASS	PASS

[github-actions]

@qiuguohua, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.9
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/eebfc02f-034b-4a92-9eb0-0c2da025f6a1/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/35331285152

Task Details