Poland mkuran.pl updates [SOURCES]

[A-dead-pixel]

As mostly stated in the commit messages:

feat: add more feeds from mkuran.pl [SOURCES] (the only available one which I haven't added is the Kielce one, as they have a funky license (see mkuran.pl/gtfs).)

• pl-kujawsko-pomorskie-miejski-zaklad-komunikacji-w-toruniu-mzk-torun-gtfs-2083.json
• pl-pomorskie-miejski-zaklad-komunikacji-w-wejherowie-mzk-wejherowo-gtfs-2084
• pl-zachodniopomorskie-komunikacja-autobusowa-swinoujscie-ka-swinoujscie-gtfs-2085.json
• pl-warminsko-mazurskie-miejski-zaklad-komunikacji-w-elku-mzk-elk-gtfs-2086
• pl-unknown-polregio-gtfs-2087
• pl-unknown-polskie-koleje-panstwowe-intercity-pkp-intercity-gtfs-2088

fix: update URLs for feeds from mkuran.pl [SOURCES] (/feed/* -> /gtfs/*)

• pl-mazowieckie-warszawska-kolej-dojazdowa-wkd-gtfs-863.json
• pl-mazowieckie-warszawski-transport-publiczny-ztm-warszawa-gtfs-1008.json
• pl-mazowieckie-mzdik-radom-gtfs-1015.json

fix: update feeds removed from mkuran.pl [SOURCES]

• pl-pomorskie-zarzad-transportu-miejskiego-gdansk-ztm-gdansk-gtfs-1014.json (this one had data on Gdynia and Gdańsk combined, but only Gdańsk publishes an up-to-date GTFS feed, so now this feed doesn't include Gdynia)
• pl-mazowieckie-komunikacja-miejska-lomianki-gtfs-1123.json (there is no replacement, so I marked it as inactive)

[CLAassistant]

All committers have signed the CLA.

[emmambd]

Thanks for this amazing review of available Poland data @A-dead-pixel!

We don't change the URL for feeds, so that there's a consistent definition of what a feed is over time. Because of this, there's two options:

1: You could update this PR to create new feeds for the new URLs, set the status of the old feeds to "deprecated", and add a redirect ID to the new feeds that replace the old ones (everything in fix: update URLs for feeds from mkuran.pl [SOURCES] (/feed/ -> /gtfs/) + the changes to 1014)

2: You could remove the feed updates from this PR, and I could do them instead to make the process simpler for you. This PR would solely consist of the new feeds, and I can add you as a reviewer to the new PR for feed updates.

[A-dead-pixel]

Ok, I will update the PR shortly and do the feed updates myself. It does indeed make more sense, especially for 1014.

[A-dead-pixel]

I deprecated the feeds and set the redirects to new ones. The only change in the first commit is the message - it had stray .jsons.

[A-dead-pixel]

I fixed the conflict between feeds with id 2083 (one in main and the other here) and rebased onto main.