Improve CLI docs (#1404)

* Improve CLI docs

* Fixed all the typos (hopefully).
* Improved the bad English. This encompasses grammar, vocabulary, generally awkward phrases, etc. The result is easier to read and understand, and in some cases shorter.
* Made some formatting improvements. This includes making formatting more consistent, but I changed some of it to be better, at least in my opinion.
* Removed certain unnecessities, the biggest one being the commands documentation. I think this is unnecessary because of the `dx --help` command. It also needs to be updated every time a command gets added/updated/removed. It doesn't really provide much extra insight than `dx --help`.
* Improved plugin documentation. I added a warning to ignore all of it, which is ironic, but the fact is that plugins are probably going to change. But by the time I learned that, I already made some changes to the plugin docs. This includes a better guide on how to get started (although still bad since the plugin system is too messy), and some general changes like the aforementioned English or formatting.
* And more. I can't list it all, but I didn't use any destructive changes. The content might be reformatted (to be shorter or easier to understand), but the meaning isn't lost.

* Fix grammar in packages/cli/docs/src/creating.md

Co-authored-by: Evan Simkowitz <esimkowitz@users.noreply.github.com>

* Update README.md

* Change config example

---------

Co-authored-by: Evan Simkowitz <esimkowitz@users.noreply.github.com>

packages/cli/docs/src/plugin/interface/log.md

@@ -1,46 +1,46 @@
 # Log Functions
 
-> You can use log function to print some useful log info
+You can use log functions to print various logging information.
 
-### Trace(info: string)
+### `trace(info: string)`
 
-Print trace log info
+Print trace log info.
 
 ```lua
 local log = plugin.log
 log.trace("trace information")
 ```
 
-### Debug(info: string)
+### `debug(info: string)`
 
-Print debug log info
+Print debug log info.
 
 ```lua
 local log = plugin.log
 log.debug("debug information")
 ```
 
-### Info(info: string)
+### `info(info: string)`
 
-Print info log info
+Print info log info.
 
 ```lua
 local log = plugin.log
 log.info("info information")
 ```
 
-### Warn(info: string)
+### `warn(info: string)`
 
-Print warning log info
+Print warning log info.
 
 ```lua
 local log = plugin.log
 log.warn("warn information")
 ```
 
-### Error(info: string)
+### `error(info: string)`
 
-Print error log info
+Print error log info.
 
 ```lua
 local log = plugin.log