Phoebusgen

What's Changed
* Madeline by madelinespark in https://github.com/als-epics/phoebusgen/pull/16
* added color tag to rules by madelinespark in https://github.com/als-epics/phoebusgen/pull/17


**Full Changelog**: https://github.com/als-epics/phoebusgen/compare/2.6.2...2.7.0

- Fix bug in combobox items dropdown list
- Add ability to use color as value in rules

fix bug in confirmation dialog for action buttons

Add 3 methods to ActionButton widget:

python
action_execute_external_script(file_name, description=None)
action_execute_javascript_script(script, description=None)
action_execute_python_script(script, description=None)


Small update to shared method for all ActionButton action_execute methods

fix TextUpdate widget to add alarm_border method

same as 2.5 but used github action to upload to pip

Bug fix for rule with non-string inputs to expression value field. General updates to repo including pre-commit which fixed trailing whitespace and moved all strings to use single quotes