DEVELOPERS: add Manuel Diener to several packages

Add myself to packages recently orphaned which I am going to continue.

Signed-off-by: Manuel Diener <manuel.diener@oss.othermo.de>
Signed-off-by: Julien Olivain <ju.o@free.fr>

DEVELOPERS

@@ -2210,6 +2210,29 @@ F:	package/ffmpeg/
 F:	package/mpv/
 F:	package/rpi-firmware/
 
+N:	Manuel Diener <manuel.diener@oss.othermo.de>
+F:	package/pico-sdk/
+F:	package/picotool/
+F:	package/python-annotated-doc/
+F:	package/python-apscheduler/
+F:	package/python-crc/
+F:	package/python-diskcache/
+F:	package/python-django/
+F:	package/python-gpiod/
+F:	package/python-immutabledict/
+F:	package/python-jc/
+F:	package/python-log-rate-limit/
+F:	package/python-pydantic/
+F:	package/python-pydantic-core/
+F:	package/python-pydantic-settings/
+F:	package/python-typing-inspection/
+F:	package/python-tzlocal/
+F:	package/python-sdbus-modemmanager/
+F:	package/python-sdbus-systemd/
+F:	package/python-varlink/
+F:	package/python-waitress/
+F:	package/python-whitenoise/
+
 N:	Marcin Bis <marcin@bis.org.pl>
 F:	package/bluez5_utils/
 F:	package/cc-tool/