Added recognition licenses for sky cultures

[alex-w]

Description

Added code to recognition the license (or licenses) info in sky cultures and show human readable hints for granted permissions for users. A few sky cultures have an updated license info in info.ini file.

Sub-tasks:

• Add information about requirement data for info.ini file into Stellarium User Guide
• Add license info into info.ini file for all sky cultures (all known)
• Removing the license info from descriptions (see description.en.utf8 files) of sky cultures

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• This change requires a documentation update

Checklist:

• My code follows the code style of this project.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (header file)
• I have updated the respective chapter in the Stellarium User Guide
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[github-actions]

Great PR! Please pay attention to the following items before merging:

Files matching src/**/*.cpp:

• Are possibly unused includes removed?

Files matching skycultures/**:

• Did you remember to update po/stellarium-skycultures/POFILES.in file respectively to changes in sky cultures?
• Did you remember to update skycultures/CMakeLists.txt and skycultures/YOUR-SKYCULTURE-FOLDER/CMakeLists.txt files respectively to changes in sky cultures?
• Did you remember to update util/skycultures/po4a.config file respectively to changes in sky cultures?
• Did you remember to define classification parameter in sky cultures?

This is an automatically generated QA checklist based on modified files

[github-actions]

Hello @alex-w! Thank you for this enhancement.

[gzotti]

These entries make sense esp. when a check is done before packing. Useful test:

• check for existence of this entry
• check for particular license keywords (check validity of this entry)

Formally, git does not like the missing newline. This must be fixed before merge.

[alex-w]

These entries make sense esp. when a check is done before packing. Useful test:

• check for existence of this entry
• check for particular license keywords (check validity of this entry)

The manager of sky cultures is the next obvious task :) Probably also with adding the script for manage packaging sky cultures into main package and separate packages for each "non-free" sky culture.

Formally, git does not like the missing newline. This must be fixed before merge.

Fixed!

[alex-w]

@gzotti please review this pull request

[gzotti]

@gzotti please review this pull request

Oops, on Sunday, OK.

[alex-w]

@sushoff please review this pull request

[sushoff]

yes, I agree - thank you for this PR

[gzotti]

Now we are complete.

[github-actions]

Hello @alex-w! Please check the fresh version (development snapshot) of Stellarium:
https://github.com/Stellarium/stellarium-data/releases/tag/weekly-snapshot

[github-actions]

Hello @alex-w! Please check the latest stable version of Stellarium:
https://github.com/Stellarium/stellarium/releases/latest