Set Edge data directory to workspace on Windows

[amartya4256]

This contributes to adding the workspace address to the display data on the initilization of the workbench. This contribution allows further SWT components to utilize this information.

Contributes to eclipse-platform/eclipse.platform.swt#1013

[github-actions]

Test Results

 1 821 files  ±0   1 821 suites  ±0   1h 50m 21s ⏱️ + 2m 23s
 7 714 tests ±0   7 485 ✅  - 1  228 💤 ±0  1 ❌ +1 
24 303 runs  ±0  23 555 ✅  - 1  747 💤 ±0  1 ❌ +1 

For more details on these failures, see this check.

Results for commit adb78fa. ± Comparison against base commit 4fbbe1b.

♻️ This comment has been updated with latest results.

[HeikoKlare]

I've updated the data key with the proper value added to SWT via:

• eclipse-platform/eclipse.platform.swt#1548

I've restricted the additional data to Windows and added proper handling for workspace-free applications (see eclipse-platform/eclipse.platform.swt#1548 (comment)). I've also simplified the retrieval of the workspace directory path string using more "proper" conversion instead of toString-conversions.

@fedejeanne can you have a look please?

[fedejeanne]

@HeikoKlare the code looks fine. I only have 2 nit-picks and one question/suggestion regarding relative locations (if that's even a thing).

If the question is irrelevant then please consider this PR approved on my account :-)

[HeikoKlare]

Failing test is unrelated and documented: #195

[sratz]

With this change we now have a directory named EBWebView very prominently lying around in the user's workspace next to all the projects:

eclipse_workspace\
    .metadata\
    asdf\
    EBWebView\
    foo_bar\
    my_demo_project\
    ...

Should we maybe put this into a separate . directory?

eclipse_workspace\
    .metadata\
    .swt_edge\
        EBWebView\
    asdf\
    foo_bar\
    my_demo_project\
    ...

Or move it into the plugin-specific instance-scoped directory?

eclipse_workspace\
    .metadata\
        .plugins\
            org.eclipse.swt\
                EBWebView\
    asdf\
    foo_bar\
    my_demo_project\
    ...

[HeikoKlare]

Or move it into the plugin-specific instance-scoped directory?

That seems to be a proper place for this folder. Makes sense to move it there instead of having it placed directly in the workspace.

Proposal: #2469