feat(ui5_create_app): Add sourceTemplate section to manifest.json

[akudev]

Add sourceTemplate section to manifest.json, so it is identifiable from which template an app is generated, in particular for further tools handling the app later.

[coveralls]

Pull Request Test Coverage Report for Build 22092251892

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 82.513%

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Totals
Change from base Build 21951956395:	0.0%
Covered Lines:	1146
Relevant Lines:	1292

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💛 - Coveralls