docs: Add bash-it doctor and logs documentation

DEVELOPMENT.md

@@ -2,6 +2,15 @@
 
 This page summarizes a couple of rules to keep in mind when developing features or making changes in Bash-it.
 
+## Debugging and Logging
+
+While developing feature or making changes in general, you can log error/warning/debug
+using `_log_error` `_log_warning` and `_log_debug`. This will help you solve problems quicker
+and also propagate important notes to other users of Bash-it.
+You can see the logs by using `bash-it doctor` command to reload and see the logs.
+Alternatively, you can set `BASH_IT_LOG_LEVEL` to `BASH_IT_LOG_LEVEL_ERROR`, `BASH_IT_LOG_LEVEL_WARNING` or `BASH_IT_LOG_LEVEL_ALL`.
+
+
 ## Load Order
 
 ### General Load Order

README.md

@@ -417,6 +417,20 @@ Unset `BASH_IT_LEGACY_PASS` to have Bash-it **return to default behavior**:
 
 * `unset BASH_IT_LEGACY_PASS`
 
+### Debugging
+
+If you encounter problems with any part of Bash-it, run the following command:
+```bash
+bash-it doctor
+```
+This will reload your bash profile and print out logs of various parts in Bash-it.
+Note that this command at default will print all logs, including debug logs.
+You can call it like this:
+```bash
+bash-it doctor [errors/warnings/all]
+```
+In order to get wanted verbosity.
+
 ### Proxy Support
 
 If you are working in a corporate environment where you have to go through a proxy server for internet access,