Bug fix hold charging, documentation updates

What's Changed

• Attempt to hold charge level with +1% on reserve by @springfall2008 in #444
• Initial documentation for Solis inverters by @fboundy in #308
• Update faq.md corrected "filter for large message warnings" code by @gcoan in #439
• Fix issue with freeze charge not freezing by @springfall2008 in #446
• Move template files into new directory by @springfall2008 in #445

Full Changelog: v7.14.6...v7.14.7