fixed pgAdmin macOS dmg installation

[shodiBoy1]

This PR fixes #798 and #878

Implemented changes:

• Added proper pgAdmin install handling for macOS: mount the downloaded .dmg, find pgAdmin 4.app, copy it to /Applications with sudo /usr/bin/ditto, then detach the DMG.
• Fixed PgAdmin#getInstallationPath(...) so an existing PATH-based installation is not ignored.
• Use the correct binary name per OS: pgAdmin4 on macOS, pgadmin4 on Linux/Windows.
• Reuse the existing privileged-command logging so users can see the sudo command before entering a password.
• Added tests for OS-specific binary names and macOS .app detection.

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Testing instructions

Check out the PR:

gh pr checkout 1995

Run on a Mac:

1. Open the project in IntelliJ.
2. Build the CLI classes once:

mvn -pl cli -DskipTests compile

3. Go to com.devonfw.tools.ide.cli.Ideasy and select Modify Run Configuration.

4. Use this run configuration:

Main class: com.devonfw.tools.ide.cli.Ideasy
Module: ide-cli
JRE: Java 25
Program arguments: --debug and 8.14 are only used to make the manual test easier to verify and reproducible. The normal user command is install pgadmin.

Working directory: any IDEasy test project folder, e.g. ~/projects/text-fix

Environment variables: IDE_ROOT=~/projects

VM options: -Dfile.encoding=UTF-8

6. Click Run.

7. Run the focused automated tests:

mvn -pl cli -Dtest=PgAdminTest test

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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"

[coveralls]

Coverage Report for CI Build 27450388724

Coverage decreased (-0.2%) to 70.811%

Details

• Coverage decreased (-0.2%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 121 coverage regressions across 4 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

121 previously-covered lines in 4 files lost coverage.

File	Lines Losing Coverage	Coverage
com/devonfw/tools/ide/tool/pgadmin/PgAdmin.java	81	14.38%
com/devonfw/tools/ide/tool/GlobalToolCommandlet.java	37	10.77%
com/devonfw/tools/ide/version/VersionSegment.java	2	89.24%
com/devonfw/tools/ide/tool/ide/IdeToolCommandlet.java	1	78.33%

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Coverage Stats

Relevant Lines:	15900
Covered Lines:	11750
Line Coverage:	73.9%
Relevant Branches:	7102
Covered Branches:	4538
Branch Coverage:	63.9%
Branches in Coverage %:	Yes
Coverage Strength:	3.13 hits per line

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💛 - Coveralls

[hohwille]

@shodiBoy1 thanks for analysing and fixing this bug.
The code looks quite redundant to already existing code (e.g. to "extract dmg", the installation routine or to prompt when running privileged operations). I got the impression that we need to understand the root cause properly and fix the bug trying to avoid the copy&paste. I hope we will soon meet in a daily or otherwise to clarify this.