Description:

Related issue (if applicable): #1235

Addition of the following accepted Home Assistant URLs (allowing direct service notifications - to those that support it):

• {schema}://{host}/{accesstoken}/{target}
• {schema}://{host}:{port}/{accesstoken}/{target}
• {schema}://{user}@{host}/{accesstoken}/{target}
• {schema}://{user}@{host}:{port}/{accesstoken}/{target}
• {schema}://{user}:{password}@{host}/{accesstoken}/{target}
• {schema}://{user}:{password}@{host}:{port}/{accesstoken}/{target}

A target follows the following set of logic:

• service
  • default domain is always 'notify' if one isn't detected
• service:target
• service:target1,target2,target3
• domain.service
• domain.service:target
• domain.service:target1,target2,target3
  • targets can be comma/space separated if more hten one

You can specify more then one target by just separating it with a / (slash) on the URL... i.e:

• hassio://hostname/long.lived.token/my_subsystem/my_subsystem2:targetA

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• No lint errors (use flake8)
• 100% test coverage

Testing

Anyone can help test this source code as follows:

# Create a virtual environment to work in as follows:
python3 -m venv apprise

# Change into our new directory
cd apprise

# Activate our virtual environment
source bin/activate

# Install the branch
pip install git+https://github.com/caronc/apprise.git@1235-hassio-notify-services

# Test out the changes with the following command:
apprise -t "Test Title" -b "Test Message" \
  'hassio://host/long-lived-token/service'