Added Telegram Bot API support (based on Twillo SMS plugin )

[Delphi251189]

To release a new version of a plugin, we suggest the following checklist. Checking these locally before pushing to the repository gives you immediate feedback, instead of waiting for the repository to automatically run the checks.

• update the information.version in manifest.json; please use semantic versioning ("major.minor.patch", e.g. "1.4.2" - major can break compatibility, minor can introduce compatible new features, patch is for bug fixes)
• in the project root directory, run bash php-cs-check.sh to check for valid PHP code
  • normally, this should report no errors
  • if any found, please fix - these could prevent your plugin from working
• in the plugins/ directory, run php ../pack-plugin.php $YOUR_PLUGIN, where $YOUR_PLUGIN is the directory name of your plugin; this creates the installable package
  • if you have a composer.json, this will check it and install the dependencies - if this reports as "outdated", please fix by running composer update in your plugin's directory
  • normally, this should finish without errors or warnings
• in the project root directory, run php validate.php
  • normally, this should report 0 errors
  • if it complains that plugins.json is outdated, run php generate-json.php > plugins.json to update it.
• commit the changes made during these steps

[Delphi251189]

Hi All.
I would like to add Telegram and Viber support, based on Twillo SMS plugin.
Also I would like to contribute this project and make it more usable for people.

Please, let me know if I'm doing something wrong, or if such kind of plugins can't be included in UISP cloud by any reason ( security, license or somewhat )