[WIP] Initial support for SearXNG public instances

[rsuwa]

Requested in https://github.com/iorate/ublacklist/issues/143 I have read the discussion at https://github.com/iorate/ublacklist/pull/195 and am trying to implement it.

Selected the four most active instances from https://searx.space/

Supported searches

• [x] Web search (*Only simple theme is supported)
• [ ] Image search
• [ ] News search
• [ ] Video search

[n14s]

thanks man, I'm looking forward to it!

[iorate]

Thank you for your contribution, but I'm closing this issue because it has no activity for a long time and can be replaced with #289.