New LinkAhead rename

Summary

Removes annoying warnings when using the advanced tools.

caosdb/internal/all#1865

Supersedes !79.

Focus

Unexpected side effects? Maybe for clients?

These are the only external changes:

• models.data_model.LINKAHEAD_INTERNAL_PROPERTIES
• export_related.export exports to linkahead_data.xml now.

Test Environment

Run unit and integration tests.

Check List for the Author

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• All automated tests pass
• Reference related issues caosdb/internal/all#1865
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

CHANGELOG.md

@@ -12,6 +12,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed ###
 
+- Using the official name "LinkAhead" wherever possible without large effort. This includes the
+  following exposed names / features:
+  - `models.data_model.LINKAHEAD_INTERNAL_PROPERTIES`
+  - `export_related.export` exports to `linkahead_data.xml` now.
+
 ### Deprecated ###
 
 ### Removed ###