plattformio-home: add alias page

[marchersimon]

platformio-home is an alias of pio-home (#5406)

[tldr-bot]

The build for this PR failed with the following error(s):

pages/common/platformio-home.md:4 MD032/blanks-around-lists Lists should be surrounded by blank lines [Context: "- View documentation for the o..."]
pages/common/platformio-home.md:4: TLDR007 Example descriptions should be surrounded by empty lines

Please fix the error(s) and push again.

[bl-ue]

Hmm...I haven't thought about alias pages for the parent commands. 🤔

The only reason I'd advise against it would be because it would create a lot of pages (however many aliases of the root command × however many subcommands 😬). But I think that probably doesn't matter.

But I'd like @sbrl to see, because she's supporting this idea :)

[marchersimon]

@bl-ue sure, I'll just do the original subcomands for now.

[bl-ue]

But let's keep this one anyway.

[sbrl]

Hrm, this is an interesting case. I'm on the fence about this actually, in that I'm somewhat concerned about the large number of aliases as @bl-ue mentions.

I would guess that you'd try tldr platformio if a subcommand doesn't work though, and then you'd see the alias message? I'm not sure I'm convinced that aliases for every subcommand of an aliased parent command are really necessary.

[marchersimon]

@sbrl I also think that would be too much. Just having the platformio alias seems fine to me.

[sbrl]

I'm closing this PR, but we can always reopen if there's more to discuss.