#2182: add commandlet view with combobox to select and execute commandlets

[Hiepiscus]

This PR fixes #2182

Adds a new commandlet view that allows user to select a commandlet from a combobox, configure its parameters, and execute it so that IDEasy commands can be run from the GUI without using the command line.

Implemented changes:

• CommandletController (new):
  • Controller that populates a sorted combobox with all available commandlet names form the CommandletManager. Parses the parameter text input and maps tokens to commandlet value properties then executes the commandlet via runCommandlet.
• commandlet-view (new):
  • FXML view with commandlet combobox, a textfield for parameters and a execute button.
• MainController:
  • Added openCommandlet() method to navigate from the main to commandlet view and connected to a new button.
• main-view: new navigation button for commandlet view.

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Testing instructions

1. Run AppLauncher
2. Set Project and Workspace
3. Click Commandlets
4. Select a commandlet from the combobox
5. Enter parameters in the text field seperated by space (e.g. mvn 3.9.4)
6. Click Run to execute

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Checklist for this PR

Make sure everything is checked before merging this PR. For further info please also see
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• When running mvn clean test locally all tests pass and build is successful
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  with internal
• You have formulated clear instructions on how to test your contribution under "Testing instructions"

[coveralls]

Coverage Report for CI Build 30266245727

Coverage decreased (-0.09%) to 72.476%

Details

• Coverage decreased (-0.09%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 38 coverage regressions across 2 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

38 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
com/devonfw/ide/gui/MainController.java	37	53.98%
com/devonfw/tools/ide/tool/ide/IdeToolCommandlet.java	1	78.33%

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Coverage Stats

Relevant Lines:	16992
Covered Lines:	12833
Line Coverage:	75.52%
Relevant Branches:	7590
Covered Branches:	4983
Branch Coverage:	65.65%
Branches in Coverage %:	Yes
Coverage Strength:	3.2 hits per line

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💛 - Coveralls