docs: add MAINTAINERS.md with maintainers and committers list

MAINTAINERS.md

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+# PikiwiDB Maintainers
+
+This document lists the maintainers, committers, and notable contributors of the PikiwiDB project.
+
+## Roles
+
+| Role | Description |
+|------|-------------|
+| **Maintainer** | Has write access to the repository, reviews and merges PRs, makes release decisions, and drives project direction. |
+| **Committer** | Active contributor with elevated trust; reviews PRs and contributes significant features or fixes over multiple releases. |
+| **Notable Contributor** | Has made meaningful one-off or focused contributions (features, bug fixes, tests, docs, tooling). |
+
+## Maintainers
+
+| GitHub ID | Name | Organization | Email |
+|-----------|------|--------------|-------|
+| [@wangshao1](https://github.com/wangshao1) | wangshao1 | — | — |
+| [@Mixficsol](https://github.com/Mixficsol) | Mixficsol | — | — |
+| [@chejinge](https://github.com/chejinge) | chejinge | 360 | [email protected] |
+
+## Committers
+
+Committers have a sustained history of high-quality contributions across multiple releases.
+
+| GitHub ID | Name |
+|-----------|------|
+| [@wangshao1](https://github.com/wangshao1) | wangshao1 |
+| [@chejinge](https://github.com/chejinge) | chejinge |
+| [@Mixficsol](https://github.com/Mixficsol) | Mixficsol |
+| [@chenbt-hz](https://github.com/chenbt-hz) | chenbt |
+| [@guangkun123](https://github.com/guangkun123) | guangkun |
+| [@wanghenshui](https://github.com/wanghenshui) | wanghenshui |
+| [@QlQlqiqi](https://github.com/QlQlqiqi) | QlQl |
+| [@cheniujh](https://github.com/cheniujh) | cheniujh |
+| [@YuCai18](https://github.com/YuCai18) | Yu Cai |
+| [@XiaoLiang2333](https://github.com/XiaoLiang2333) | DawnBeams |
+| [@luky116](https://github.com/luky116) | JayLiu |
+| [@buzhimingyonghu](https://github.com/buzhimingyonghu) | buzhimingyonghu |
+| [@dingxiaoshuai123](https://github.com/dingxiaoshuai123) | dingxiaoshuai |
+| [@lqxhub](https://github.com/lqxhub) | lqxhub |
+| [@chengyu-l](https://github.com/chengyu-l) | chengyu-l |
+| [@baerwang](https://github.com/baerwang) | baerwang |
+
+## Notable Contributors
+
+The following contributors have made meaningful contributions to specific features, bug fixes, tests, or tooling.
+
+| GitHub ID | Name |
+|-----------|------|
+| [@vacheli](https://github.com/vacheli) | vacheli |
+| [@bigdaronlee163](https://github.com/bigdaronlee163) | bigdaronlee163 |
+| [@longfar-ncy](https://github.com/longfar-ncy) | longfar-ncy |
+| [@gukj-spel](https://github.com/gukj-spel) | gukj-spel |
+| [@MalikHou](https://github.com/MalikHou) | MalikHou |
+| [@hahahashen](https://github.com/hahahashen) | hahahashen |
+| [@KKorpse](https://github.com/KKorpse) | KKorpse |
+| [@sjcsjc123](https://github.com/sjcsjc123) | sjcsjc123 |
+| [@JasirVoriya](https://github.com/JasirVoriya) | JasirVoriya |
+| [@HappyUncle](https://github.com/HappyUncle) | HappyUncle |
+| [@Y-Rookie](https://github.com/Y-Rookie) | Y-Rookie |
+| [@panlei-coder](https://github.com/panlei-coder) | panlei-coder |
+| [@tedli](https://github.com/tedli) | tedli |
+| [@chienguo](https://github.com/chienguo) | chienguo |
+| [@Polaris3003](https://github.com/Polaris3003) | Polaris3003 |
+| [@callme-taota](https://github.com/callme-taota) | callme-taota |
+| [@jettcc](https://github.com/jettcc) | jettcc |
+| [@ForestLH](https://github.com/ForestLH) | ForestLH |
+| [@tsinow](https://github.com/tsinow) | tsinow |
+| [@saz97](https://github.com/saz97) | saz97 |
+| [@u6th9d](https://github.com/u6th9d) | u6th9d |
+| [@Tianpingan](https://github.com/Tianpingan) | Tianpingan |
+| [@machinly](https://github.com/machinly) | machinly |
+| [@hero-heng](https://github.com/hero-heng) | hero-heng |
+| [@baixin01](https://github.com/baixin01) | baixin01 |
+| [@xiezheng-XD](https://github.com/xiezheng-XD) | xiezheng-XD |
+| [@A2ureStone](https://github.com/A2ureStone) | A2ureStone |
+| [@klboke](https://github.com/klboke) | klboke |
+| [@007gzs](https://github.com/007gzs) | 007gzs |
+
+## Emeritus Maintainers
+
+Individuals who have previously served as maintainers and have since stepped back.  
+We thank them for their valuable contributions.
+
+<!-- Add emeritus maintainers here when applicable -->
+
+## How to Become a Committer or Maintainer
+
+- **Committer**: Submit high-quality contributions over time, actively participate in code reviews, and be nominated by an existing Maintainer.
+- **Maintainer**: Demonstrate deep understanding of the codebase, a sustained track record as a Committer, and be approved by a majority of existing Maintainers.
+
+Nominations are discussed in the project's community channels. Please reach out to the project team at [[email protected]](mailto:[email protected]) if you are interested.
+
+## Contact
+
+For governance-related inquiries, please open an issue or contact [[email protected]](mailto:[email protected]).