#871: add progress bar to DMG extraction

[shodiBoy1]

This PR fixes #871

Implemented changes:

• added a Copying progress bar while IDEasy copies an application from a mounted DMG.
• reused the existing recursive copy logic and update the progress after each copied file.
• added a focused test for the progress bar and updated the changelog.

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Testing instructions

1. On macOS, check out this PR:

   gh pr checkout 2408

2. Run the focused test:

   cd cli
   mvn -Dtest=FileAccessImplTest#testExtractDmgWithProgressBar test

3. Verify that the test finishes with BUILD SUCCESS.

4. Optionally, run a real DMG installation:

mvn exec:exec -Dexec.executable=java -Dexec.args="-cp %classpath com.devonfw.tools.ide.cli.Ideasy --force install pycharm"

6. Verify that the Copying progress reaches 100%, the DMG is detached, and the installation completes.

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Checklist for this PR

• 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 and not feature/921 fixed setup.bat). If no issue ID exists, title only.
• PR top-level comment summaries 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 labelled
  with internal
• You have not changed any dependency in pom.xml files or otherwise if runtime dependencies changed, you have updated our LICENSE.asciidoc
• You have formulated clear instructions on how to test your contribution under "Testing instructions"

[coveralls]

Coverage Report for CI Build 33916190084

Coverage increased (+0.1%) to 73.978%

Details

• Coverage increased (+0.1%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 171 coverage regressions across 1 file.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

171 previously-covered lines in 1 file lost coverage.

File	Lines Losing Coverage	Coverage
com/devonfw/tools/ide/io/FileAccessImpl.java	171	71.88%

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Coverage Stats

Relevant Lines:	18714
Covered Lines:	14470
Line Coverage:	77.32%
Relevant Branches:	8340
Covered Branches:	5544
Branch Coverage:	66.47%
Branches in Coverage %:	Yes
Coverage Strength:	3.3 hits per line

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💛 - Coveralls