#1917: add scripts for gui shortcut launcher windows, linux, macos

[quando632]

This PR fixes #1917

Implemented changes:

1. Adding scripts to launch the IDEasy GUI as desktop shortcut in Windows/MacOs/linux

---

Testing instructions

Please add conscise, understandable instructions on how a reviewer can test/verify the functionality of your contribution here:

1. Test it on Windows by open the searchbar and search for "IDEasy Gui"
2. Run the application shortcut "IDEasy Gui"
3. If the GUI appears then it is working correct
4. Same Workflow for Linux and MacOs

---

Checklist for this PR

Make sure everything is checked before merging this PR. For further info please also see
our DoD.

• When running mvn clean test locally all tests pass and build is successful
• PR title is of the form #«issue-id»: «brief summary» (e.g. #921: fixed setup.bat). If no issue ID exists, title only.
• PR top-level comment summarizes what has been done and contains link to addressed issue(s)
• PR and issue(s) have suitable labels
• Issue is set to In Progress and assigned to you or there is no issue (might happen for very small PRs)
• You followed all coding conventions
• You have added the issue implemented by your PR in CHANGELOG.adoc unless issue is labeled
  with internal
• You have formulated clear instructions on how to test your contribution under "Testing instructions"

Checklist for tool commandlets

Have you added a new «tool» as commandlet? There are the following additional checks:

• The tool can be installed automatically (during setup via settings) or via the commandlet call
• The tool is isolated in its IDEasy project, see Sandbox Principle
• The new tool is added to the table of tools in LICENSE.asciidoc
• The new commandlet is a command-wrapper for «tool»
• Proper help texts for all supported languages are added here
• The new commandlet installs potential dependencies automatically
• The variables «TOOL»_VERSION and «TOOL»_EDITION are honored by your commandlet
• The new commandlet is tested on all platforms it is available for or tested on all platforms that are in scope of the linked issue

[CLAassistant]

All committers have signed the CLA.

[coveralls]

Coverage Report for CI Build 27682065877

Coverage decreased (-0.009%) to 71.276%

Details

• Coverage decreased (-0.009%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 1 coverage regression across 1 file.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

1 previously-covered line in 1 file lost coverage.

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

---

Coverage Stats

Relevant Lines:	16222
Covered Lines:	12055
Line Coverage:	74.31%
Relevant Branches:	7250
Covered Branches:	4675
Branch Coverage:	64.48%
Branches in Coverage %:	Yes
Coverage Strength:	3.15 hits per line

---

💛 - Coveralls