[enh] Add Tineye reverse image search

[allendema]

What does this PR do?

Adds Tineye engine for reverse image searching.

Simply paste the URL of the image you want to search for.

Why is this change important?

Add an engine for reverse image searching.

Make searX better.

How to test this PR locally?

!tin https://asteroidos.org/public/img/logo.png

Author's checklist

Other optional parametesr:

&sort=crawl_date can be appended to search_string to sort results by date.
&domain=example.org can be implemented to search_string in order to get results from just one domain.

Public instances could get relatively fast timed-out for 3600s.

Check if the shorcut is alright.

Related issues

#2962
#1895

Example

Tineye in Action

[kvch]

Could you please rebase and fix the pylint issues with the PR?

[kvch]

Sorry for only getting back to you now. I have just tested the engine with the example you provided in the PR description and I get this backtrace:

ERROR:searx.search.processor.online:engine tineye : requests exception(search duration : 1.6560711860656738 s, timeout: 9.0 s) : 400 Client Error: Bad Request for url: https://tineye.com/result_json/?page=1&url=https%3A%2F%2Fa
steroidos.org%2Fpublic%2Fimg%2Flogo.png
For more information check: https://httpstatuses.com/400
Traceback (most recent call last):
  File "/home/n/p/searx/searx/search/processors/online.py", line 139, in search
    search_results = self._search_basic(query, params)
  File "/home/n/p/searx/searx/search/processors/online.py", line 119, in _search_basic
    response = self._send_http_request(params)
  File "/home/n/p/searx/searx/search/processors/online.py", line 91, in _send_http_request
    response = req(params['url'], **request_args)
  File "/home/n/p/searx/searx/network/__init__.py", line 126, in get
    return request('get', url, **kwargs)
  File "/home/n/p/searx/searx/network/__init__.py", line 119, in request
    raise_for_httperror(response)
  File "/home/n/p/searx/searx/network/raise_for_httperror.py", line 66, in raise_for_httperror
    resp.raise_for_status()
  File "/home/n/p/searx/venv3.9/lib/python3.9/site-packages/httpx/_models.py", line 1105, in raise_for_status
    raise HTTPStatusError(message, request=request, response=self)
httpx.HTTPStatusError: 400 Client Error: Bad Request for url: https://tineye.com/result_json/?page=1&url=https%3A%2F%2Fasteroidos.org%2Fpublic%2Fimg%2Flogo.png

Could you please address this problem or let me know what I am doing wrong?

[allendema]

Nothing is wrong but it happend that the query was to simple.
error: "Too Simple"

Different image must work.

Just keep in mind that if many requests are detected and timeout will be posed by Tineye.