Update docs with more howto examples (#968)

Co-authored-by: Teemu R. <tpr@iki.fi>

docs/source/guides.md

@@ -1,44 +1,16 @@
 # How-to Guides
 
-This page contains guides of how to perform common actions using the library.
+Guides of how to perform common actions using the library.
 
-## Discover devices
+```{toctree}
+:maxdepth: 2
 
-```{eval-rst}
-.. automodule:: kasa.discover
-    :noindex:
-```
-
-## Connect without discovery
-
-```{eval-rst}
-.. automodule:: kasa.deviceconfig
-    :noindex:
-```
-
-## Get Energy Consumption and Usage Statistics
-
-:::{note}
-In order to use the helper methods to calculate the statistics correctly, your devices need to have correct time set.
-The devices use NTP and public servers from [NTP Pool Project](https://www.ntppool.org/) to synchronize their time.
-:::
-
-### Energy Consumption
-
-The availability of energy consumption sensors depend on the device.
-While most of the bulbs support it, only specific switches (e.g., HS110) or strips (e.g., HS300) support it.
-You can use {attr}`~Device.has_emeter` to check for the availability.
-
-
-### Usage statistics
-
-You can use {attr}`~Device.on_since` to query for the time the device has been turned on.
-Some devices also support reporting the usage statistics on daily or monthly basis.
-You can access this information using through the usage module ({class}`kasa.modules.Usage`):
-
-```py
-dev = SmartPlug("127.0.0.1")
-usage = dev.modules["usage"]
-print(f"Minutes on this month: {usage.usage_this_month}")
-print(f"Minutes on today: {usage.usage_today}")
+guides/discover
+guides/connect
+guides/device
+guides/module
+guides/feature
+guides/light
+guides/strip
+guides/energy
 ```