Revert MAINTAINERS to .rst and add it to the docs build

- restore MAINTAINERS.rst (drop the .md); make the changelog link absolute so it
  resolves both on GitHub and in the rendered docs
- docs/maintainers.rst includes the root file (same pattern as README) and is
  wired into the Documentation toctree

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

MAINTAINERS.md

@@ -1,8 +0,0 @@
-# Maintainers
-
-- [Ha Thach](https://github.com/hathach) — author and maintainer
-- [Zixun Li (HiFiPhile)](https://github.com/HiFiPhile) — maintainer; audio expertise
-
-Everyone who has contributed is credited per release in the
-[changelog](docs/info/changelog/index.rst) and in the GitHub
-[contributors graph](https://github.com/hathach/tinyusb/graphs/contributors).

MAINTAINERS.rst

@@ -0,0 +1,10 @@
+***********
+Maintainers
+***********
+
+- `Ha Thach <https://github.com/hathach>`__ — author and maintainer
+- `Zixun Li (HiFiPhile) <https://github.com/HiFiPhile>`__ — maintainer; audio expertise
+
+Everyone who has contributed is credited per release in the
+`changelog <https://docs.tinyusb.org/en/latest/info/changelog/index.html>`__ and in the GitHub
+`contributors graph <https://github.com/hathach/tinyusb/graphs/contributors>`__.

docs/index.rst

@@ -18,6 +18,7 @@
    troubleshooting
    faq
    info/changelog/index
+   maintainers
 
 .. toctree::
    :maxdepth: 2

docs/maintainers.rst

@@ -0,0 +1 @@
+.. include:: ../MAINTAINERS.rst