Config: Add short names for common CLI parameters

[lastzero]

As a user who frequently uses PhotoPrism in a terminal, I would like to have shorter flag names for common parameters so I have to type and scroll less, e.g. -i for --wakeup-interval.

Overview of command parameter short names (their use is optional):

Existing Flag	Short Name
admin-password	--pw PASSWORD
auth	-a
log-level	-l value
public	-p
read-only	-r
experimental	-e
config-file	-c FILENAME
config-path	--conf PATH
originals-path	-o PATH
originals-limit	--mb MEGABYTES
resolution-limit	--mp MEGAPIXELS
storage-path	-s PATH
wakeup-interval	-i DURATION
default-locale	--lang LOCALE
site-url	--url URL
http-port	--port PORT
http-host	--ip IP
http-mode	--mode MODE
http-compression	-z METHOD
database-driver	--db NAME
database-dsn	--dsn DSN
database-server	--db-server SERVER
database-name	--db-name NAME
database-user	--db-user USER
database-password	--db-pass PASSWORD
ffmpeg-encoder	--vc NAME
ffmpeg-bitrate	--vb RATE
thumb-filter	--filter NAME
thumb-uncached	-u
jpeg-quality	-q QUALITY