Update coding-style.md content

docs/guidelines/coding-style.md

@@ -7,17 +7,85 @@ description: Hi
 Consistent code style is good practice to keep code more readable across whole project, that makes it more readable and makes it easier to collaborate within a development team or contributors.
 
 ## Language guidelines
-+ Prefer modern features and constructions than older ones
-+ Use latest language version (whenever it possible)
++ Prefer modern features and constructions than older ones.
++ Use latest language version (whenever it possible).
 + Use language keywords for data types instead of them full name:
-	+ `u32` but not `std::numerics::UInt32` nor `UInt32`
+	+ `u32` but not `std::numerics::UInt32` nor `UInt32`.
 
 ## Prefer *fast* boolean operators
-+ Use fast `&&` and `||` boolean operators instead of `&` and `|` operators
++ Use fast `&&` and `||` boolean operators instead of `&` and `|` operators.
 
 ## Style prefer
-+ Use [K&R](https://en.wikipedia.org/wiki/Indentation_style#K&R) style for braces
-+ Prefer tabulation than spaces
-	+ If spaces is used: use 4 spaces for indentation
-	+ Store prefered indentation style to `.editorconfig` file of your project
-+ Do not make too long lines
++ Use [K&R](https://en.wikipedia.org/wiki/Indentation_style#K&R) style for braces.
++ Prefer tabulation than spaces.
+	+ If spaces is used: use 4 spaces for indentation.
+	+ Store prefered indentation style to `.editorconfig` file of your project. ([see example](https://github.com/nitis-languages/example-projects/blob/main/.editorconfig#L7-L12))
++ Do not make too long lines.
+
+## Use directive order
++ Sort `use` statements from less nested to most.
+=== "Prefer"
+
+	```nite
+	use std;
+	use std::numerics;
+	use other_lib;
+	use other_lib::extra;
+	use other_lib::extra::download;
+	use other_lib::extra::import;
+	```
+=== "Do not prefer"
+
+	```nite
+	use std::numerics;
+	use std;
+	use other_lib::extra::download;
+	use other_lib::extra::import;
+	use other_lib::extra;
+	use other_lib;
+	```
++ Don't interrupt using sequence.
+=== "Prefer"
+
+	```nite
+	use other_lib;
+	use other_lib::extra::download;
+	use other_lib::extra::import;
+	use other_lib::extra;
+	use other_lib::modern;
+	```
+=== "Do not prefer"
+
+	```nite
+	use other_lib;
+	use other_lib::extra::download;
+	use other_lib::modern;
+	use other_lib::extra::import;
+	use other_lib::extra;
+	```
+
+## Place module after use statements
+Highly recommended to place module declaration right after use statements with one empty line before the declaration.
+
+=== "Prefer"
+	```nite
+	use std;
+
+	module sigma_lib;
+
+	...
+	```
+=== "Do not prefer"
+	```nite
+	module sigma_lib;
+
+	use std;
+
+	...
+	```
+
+## Comments style
++ Use single-line comments (`//`) for brief explanations.
++ Place comments before the explanation part, not at the end of the line.
++ Begin comment with uppercase letter.
++ Insert one space between `//` and the comment text.