feat: add paho mqtt c lib

[gocarlos]

Specify library name and version: paho-c/1.3.0

based on https://github.com/conan-community/conan-paho-c

closes #916

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

[conan-center-bot]

Failure in build 1 (c5a32bd1071a60f09dfa360bb97268ed5eb8c2d0):
paho-c/1.3.0:

• Error processing recipe: Linux x86_64, Release, gcc 5, libstdc++ . Options: paho-c:shared-True
  Unexpected error happened:

ERROR: paho-c/1.3.0: Error in package_id() method, line 79
	if self.options.header_only:
	ConanException: 'options.header_only' doesn't exist
Possible options are ['shared', 'fPIC', 'SSL', 'asynchronous']

[conan-center-bot]

Some configurations of 'paho-c/1.3.0' failed in build 3 (62742b9b5d0bd8cb724c0e773ca29040591818ef):

• Linux x86_64, Release, gcc 5, libstdc++ . Options: paho-c:shared-True
  • Log download
  • Log error Download
  • Profile
• Access to all the logs

[conan-center-bot]

Some configurations of 'paho-mqtt-c/1.3.0' failed in build 4 (60daeb7a20188056db04f39102dee27598bd7f93):

• Linux x86_64, Release, gcc 5, libstdc++ . Options: paho-mqtt-c:shared-True
  • Hooks errors detected:
    • [HOOK - conan-center.py] post_source(): ERROR: [CPPSTD MANAGEMENT (KB-H022)] Can't detect C++ source files but recipe does not remove 'self.settings.compiler.cppstd' (https://github.com/conan-io/conan-center-index/wiki/Error-Knowledge-Base#KB-H022)
  • Log download
  • Log error Download
  • Profile
• Access to all the logs

[conan-center-bot]

Some configurations of 'paho-mqtt-c/1.3.0' failed in build 5 (6bacbd96c11aa8626dfb1857f1f6323090cb0478):

• Linux x86_64, Release, gcc 5, libstdc++ . Options: paho-mqtt-c:shared-True
  • Log download
  • Log error Download
  • Profile
• Access to all the logs

[conan-center-bot]

Some configurations of 'paho-mqtt-c/1.3.0' failed in build 6 (b75e678e9c24aa29f8bb66f72e8b024cd1e2cfcc):

• Linux x86_64, Release, gcc 5, libstdc++ . Options: paho-mqtt-c:shared-True
  • Log download
  • Log error Download
  • Profile
• Access to all the logs

[conan-center-bot]

All green in build 7 (44d2d065b80d8427996b490e341f43e17a1083bc)! 😊

• paho-mqtt-c/1.3.0: Generated 82 packages. All logs here

[conan-center-bot]

Some configurations of 'paho-mqtt-c/1.3.0' failed in build 8 (8b91a1e1e593bc704e8c32b2416f8b60be0bfd39):

• Linux x86_64, Release, gcc 5, libstdc++ . Options: paho-mqtt-c:shared-True
  • Log download
  • Log error Download
  • Profile
• Access to all the logs

[conan-center-bot]

All green in build 9 (7eb87f003f06a209fe677894a054bf33658fa127)! 😊

• paho-mqtt-c/1.3.0: Generated 82 packages. All logs here

[conan-center-bot]

All green in build 10 (2922c079b1da7c6cafa4fdfd5f160aed2c4f1c56)! 😊

• paho-mqtt-c/1.3.0: Generated 82 packages. All logs here

[uilianries]

I think Paho MQTT C sounds better nowadays, as they have more projects involved now.

[gocarlos]

@danimtb anything else that should be done here to get this merged?

[gocarlos]

@SSE4 deprecate https://github.com/conan-community/conan-paho-c ?

[uilianries]

Yeah, I'll do it!