Add NBP (National Bank of Poland) currency exchange rates API

Changed waifu.pics url

changed to to api docs in stead of main page

Added Visual Crossing Weather API

Indeed has discontinued their API. See https://stackoverflow.com/a/66036140/13752077

The PR #1610 added an duplicate link to the government section

The PR #1610 added an extra blank line

This isn't an API but rather the site where they are collated by the UK
government.

I've added the data.gov.uk site as a separate entry for clarity (because
of the number of similar sites from other countries). This site is also
linked to from the API catalogue site.

Removed .com from wecantrack.com

Fixes the issue #1307

The links https://plino.herokuapp.com and https://sentim-api.herokuapp.com were broken

Mozilla Observatory ordered alphabetically

This description broken tests:

- description should not end with .
- description should not exceed 100 characters (currently 131)

Close #1095

Close #999

Closes #1597

Add IPGEO API by TechnikNews and Fix path of url

Note: Inactive user.

Close #1017

Adding Jokes One API, Math tools Numbers API, Fungenerators QR code and random facts API.

Note: Inative Pull Request #1005

Close #1005

IBM Watson™ Visual Recognition is discontinued. Existing instances are supported until 1 December 2021, but as of 7 January 2021, you can't create instances. Any instance that is provisioned on 1 December 2021 will be deleted.

Close #1589

Ticksel is now EOL (End-Of-Life)

Close (#1569)

Co-authored-by: Matheus Felipe <50463866+matheusfelipeog@users.noreply.github.com>