bsp/renesas: add EK-RA4E2 bsp support

[miaolei7456]

拉取/合并请求描述：(PR description)

[

为什么提交这份PR (why to submit this PR)

添加EK-RA4E2开发板的支持，目前使用的是FSP6.0版本
存在的问题：
寄出功能调通。目前只调通一路usart，板卡3个led，其他spi/iic/i3c未完成移植。

你的解决方案是什么 (what is your solution)

后续迭代更新

请提供验证的bsp和config (provide the config and bsp)

• BSP:

• .config:

• action:

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

[CLAassistant]

All committers have signed the CLA.

[github-actions]

📌 Code Review Assignment

🏷️ Tag: bsp_renesas

Reviewers: @kurisaW

Changed Files (Click to expand)

• bsp/renesas/ra4e2-ek/.api_xml
• bsp/renesas/ra4e2-ek/.config
• bsp/renesas/ra4e2-ek/.gitignore
• bsp/renesas/ra4e2-ek/.ignore_format.yml
• bsp/renesas/ra4e2-ek/.secure_azone
• bsp/renesas/ra4e2-ek/.secure_rzone
• bsp/renesas/ra4e2-ek/.secure_xml
• bsp/renesas/ra4e2-ek/.settings/standalone.prefs
• bsp/renesas/ra4e2-ek/JLinkSettings.JLinkScript
• bsp/renesas/ra4e2-ek/Kconfig
• bsp/renesas/ra4e2-ek/README.md
• bsp/renesas/ra4e2-ek/SConscript
• bsp/renesas/ra4e2-ek/SConstruct
• bsp/renesas/ra4e2-ek/board/Kconfig
• bsp/renesas/ra4e2-ek/board/SConscript
• bsp/renesas/ra4e2-ek/board/board.h
• bsp/renesas/ra4e2-ek/board/ports/SConscript
• bsp/renesas/ra4e2-ek/board/ports/gpio_cfg.h
• bsp/renesas/ra4e2-ek/bsp_linker_info.h
• bsp/renesas/ra4e2-ek/buildinfo.gpdsc
• bsp/renesas/ra4e2-ek/configuration.xml
• bsp/renesas/ra4e2-ek/fsp_gen.scat
• bsp/renesas/ra4e2-ek/memory_regions.scat
• bsp/renesas/ra4e2-ek/project.uvoptx
• bsp/renesas/ra4e2-ek/project.uvprojx
• bsp/renesas/ra4e2-ek/ra/SConscript
• bsp/renesas/ra4e2-ek/ra/arm/CMSIS_6/CMSIS/Core/Include/a-profile/cmsis_armclang_a.h
• bsp/renesas/ra4e2-ek/ra/arm/CMSIS_6/CMSIS/Core/Include/a-profile/cmsis_clang_a.h
• bsp/renesas/ra4e2-ek/ra/arm/CMSIS_6/CMSIS/Core/Include/a-profile/cmsis_cp15.h

🏷️ Tag: workflow

Reviewers: @Rbb666 @kurisaW @supperthomas

Changed Files (Click to expand)

• .github/ALL_BSP_COMPILE.json

---

📊 Current Review Status (Last Updated: 2025-08-24 03:22 CST)

• ⌛ @Rbb666 Pending Review
• ⌛ @kurisaW Pending Review
• ⌛ @supperthomas Pending Review

---

📝 Review Instructions

1. 维护者可以通过单击此处来刷新审查状态: 🔄 刷新状态
   Maintainers can refresh the review status by clicking here: 🔄 Refresh Status

2. 确认审核通过后评论 LGTM/lgtm
   Comment LGTM/lgtm after confirming approval

3. PR合并前需至少一位维护者确认
   PR must be confirmed by at least one maintainer before merging

ℹ️ 刷新CI状态操作需要具备仓库写入权限。
ℹ️ Refresh CI status operation requires repository Write permission.

[Rbb666]

这个中间文件可以使用 .gitignore 忽略提交下

[Rbb666]

@miaolei7456 PR的标题修改下吧，说明下此PR具体做了什么