#1293 ensure core longpaths on windows

[cthies-capgemini]

This PR fixes #1293 .

Implemented changes:

• use GitContext.verifyGitInstalled to check if git is installed
• make verifyGitInstalled public instead of private to allow this

[coveralls]

Pull Request Test Coverage Report for Build 15488457870

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 38 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.008%) to 67.734%

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Files with Coverage Reduction	New Missed Lines	%
com/devonfw/tools/ide/tool/ide/IdeToolCommandlet.java	1	78.33%
com/devonfw/tools/ide/git/GitContextImpl.java	8	55.8%
com/devonfw/tools/ide/tool/IdeasyCommandlet.java	29	81.77%

Totals
Change from base Build 15437967653:	-0.008%
Covered Lines:	8111
Relevant Lines:	11570

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💛 - Coveralls

[jan-vcapgemini]

@cthies-capgemini thanks for providing a fix to detect git properly. LGTM.

[jan-vcapgemini]

I've tested your changes with following steps:

1. Compiled a new ideasy.exe with graalvm
2. Downloaded a fresh setup of IDEasy
3. Replaced the ideasy.exe of my setup bin folder with my compiled one
4. Removed all git related paths from my System and User paths.
5. Rebooted the computer
6. Renamed the C:\Program Files\Git\mingw64\bin\git.exe to git.exe1
7. Removed IDE_ROOT and _ide/installation/bin from my User path.
8. Deleted the maven folder from C:\Users<myuser>\projects_ide\software
9. Run the setup of IDEasy

After the installation of IDEasy I've got following error message:

Git is not installed on your computer but required by IDEasy. Please download and install git:
https://git-scm.com/download/

I've also deleted the longpaths from my .gitconfig and it was re-added properly.