Inkplate 6PLUS features and fixes

[phidauex]

Apologies for this messy pull request - still a novice at this. This request addresses a number of small fixes as well as prepares for Inkplate 6PLUS compatibility.

• New build environment options in platform.ini (ota and debug still default to Inkplate10, but there is a custom env for the 6 plus)
• New fonts to provide more options, including the nice "condensed" roboto
• Touchscreen init for 6PLUS (currently only allows the touch screen to wake, but that can be expanded on later)
• Fix to TZ name and move TZ variables up into the config_example.h file
• Update to battery % formula including more precise voltages, and a change to the percentage calculation to prevent overflows at very low / slightly negative SOCs.
• Some reformats to the Info display - I believe this should still look good on the Inkplate 10.

[lanrat]

Hello @phidauex, thanks for the PR!

There is a lot going on here, and I'm currently traveling so I won't be able to test this until next week. However after a
quick preliminary review, I see that you changed a few of the constants I had used to specify font sizes, pixel locations/offsets, etc.. for the Inkplate 6.

Since the Inkplate 6 and 10 have different sizes, would you be able to put your changes behind an #IFDEF to support both platforms, or where possible, use a calculation based on the E_INK_HEIGHT and E_INK_WIDTH constants that would work for both devices?

[phidauex]

Let me attempt to split this PR into two (I think I can do that). That would leave one with changes to allow for basic Inkplate 6PLUS functionality and a few fixes, and then a second that reformats the Info page (in a way that I think will look better on both the 6PLUS and the 10). This is probably too much to review all together.