New watch list feature, tweak to metric keep, bug fixes

What's Changed

• Change default for inverter_reset_soc to True meaning for non-hybrid inverters the target soc % is set back to 100% after charging
• Change behaviour around SOC Keep to prevent forced discharging past the threshold
• Disabled set charge freeze on non-GE inverters
• Added new watch list feature that can be used to update the Predbat plan when HA sensors change e.g. car plugged in status

• Watch list feature by @springfall2008 in #769
• Update install.md by @springfall2008 in #770
• Tidy up thread data passing code by @springfall2008 in #771
• Disable 4 hour keep rule after forced discharge by @springfall2008 in #774
• Update huawei.yaml by @springfall2008 in #775
• Add devices section to docs by @springfall2008 in #776
• Change default for inverter reset soc to True by @springfall2008 in #777

Full Changelog: v7.16.0...v7.16.1