Resolve "Improve themes screen to define application colors and preferences and generate a css screen with css variables based on this"

What does this MR do

Upgrade themes to allow define theme colors and styles inside theme management screen

IMPACTS:

• New AweThmCol table (defined on SQL scripts)
• New AweUsrSet table (defined on SQL scripts)

New session setting available to define for users (if you want to maintain dark/light theme persistence in session)

• themeMode: Defines if current theme mode for the logged user is dark or light. To initialize it after login add the following line in application.properties file:

awe.session.parameter.themeMode=getUserThemeMode

Related issues

Fix #496 (closed)

Your checklist for this pull request

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• Make sure your merge request is to develop or /feature /bugfix branch. Don't request your master!
• Check the commit's or even all commits' message styles matches our requested structure.
• Check the commit's pass the CI pipeline.
• New and existing unit tests pass locally with my changes.
• Commented code, particularly in hard-to-understand areas

❤ Thank you from AWE team!

Closes #496 (closed)