Add missing SWT FAQ pages

[tivervac]

@vogella Sorry for the delay. This PR is the followup for eclipse-platform/eclipse.platform.swt#1634

I can remove the cleanup if required, I'm mostly interested in the new pages.

[vogella]

@tivervac Thanks. From a quick gance the change looks good. I assume lots of this information needs updates based on work @HeikoKlare (Edge) and @HannesWell (GTK) are doing but that could be done IMHO in another PR.

I have a close look next week and will merge it if I do not find issues.

[github-actions]

Test Results

 1 599 files  +1   1 599 suites  +1   1h 25m 53s ⏱️ - 1m 4s
 4 173 tests ±0   4 150 ✅ ±0   23 💤 ±0  0 ❌ ±0 
12 001 runs  +3  11 835 ✅ +3  166 💤 ±0  0 ❌ ±0 

Results for commit d10ae88. ± Comparison against base commit 661c9f5.

♻️ This comment has been updated with latest results.

[HeikoKlare]

I've made a note to myself to take a look at and update the FAQ related to Edge soon. They also look rather outdated to me.

[tivervac]

@vogella the single CI failure doesn't seem to be because of my changes. Do these look good or should we wait for Heiko?

[HeikoKlare]

Thank you the implicit reminder 🙂 I have just prepared an adaptation of the Edge FAQ. I would propose to keep this PR as is and make everything else (including my proposal) as a follow-up change. What do you think?

Just two thoughts regarding this PR:

• When making my changes, I have been searching some time for the document, because most files are named FAQ_* while some of the new files are named FAQ-*. It's rather nitpicky, but should/could we align the names to have them properly ordered?
• Some of the new FAQ pages are missing a headline (exactly the ones having a differently formatted file name). Should we add a headline to them?

[tivervac]

Yes, that makes sense. Done.

[HeikoKlare]

Great, thank you for the quick reply! I would be in favor of merging your changes then to finally have them in. In case there is need for adaptation, we can still make follow-up changes.
Could you squash your commits and rebase on master?

[vogella]

Thanks @HeikoKlare and @tivervac for handling this one. I lost track of this one.