Move param doc (#2843)

moved param doc from docs repo to here

param-docs/parameter-pages/Debug/LogLevel.md

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+# Parameter `LogLevel`
+Default Value: `1` (`ERROR`)
+Define the log level for the logging to the SD-Card.
+
+Available options:
+
+- `1`: `ERROR`
+- `2`: `WARNING`
+- `3`: `INFO`
+- `4`: `DEBUG`
+
+As higher the level, as more log messages get written to the SD-Card.
+
+!!! Warning
+    `DEBUG` or `INFO` might damage the SD-Card if enabled long term due to excessive writes to the SD-Card!
+    A SD-Card has limited write cycles. Since the device does not do [Wear Leveling](https://en.wikipedia.org/wiki/Wear_leveling), this can wear out your SD-Card!

param-docs/parameter-pages/Debug/LogfilesRetention.md

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+# Parameter `LogfilesRetention`
+Default Value: `3`
+
+Unit: Days
+
+Number of days to keep the log files (`0` = forever).