doc: added docs for --version

- replaced the outdated showcase image in the readme with the newly added list parsing
- update help message information in Usage.md
- check the list item for lists in Features.md

Author: xNaCly

README.md

@@ -34,4 +34,5 @@ Until a release is ready please build from source.
 fleck README.md
 ```
 
-- View the output: ![Readme.png](./doc/assets/README.png)
+- View the output:
+  ![Readme.png](./doc/assets/README.png)

doc/Features.md

@@ -6,7 +6,7 @@ Fleck implements the basic markdown features everyone needs, while extending mar
 
 - [x] Headers
 - [x] Blockquotes
-- [ ] unordered Lists
+- [x] unordered Lists
 - [ ] to-do lists
 - [x] Code blocks
 - [x] Code inline

doc/Usage.md

@@ -21,6 +21,7 @@ Usage:
 
 Options:
         --debug                         enables debug logs
+        --version                       prints version and build information, exists
         --no-prefix                     hide the informational comments generated in the output html
         --no-template                   write html output to a file without the default html scaffolding
         --silent                        disables info logs, reduces output significantly
@@ -30,7 +31,7 @@ Options:
         --preprocessor-enabled          enables the preprocessor to replace macros, decreases performance
         --shell-macro-enabled           enables the dangerous '@shell{command}' macro, which allows the preprocessor to run any command on your system
 
-2023/04/14 10:02:52 error: not enough arguments, specify an input file
+2023/04/17 08:53:58 error: not enough arguments, specify an input file
 exit status 1
 ```
 
@@ -41,6 +42,7 @@ exit status 1
 | Option                   | description                                                       | default value |
 | ------------------------ | ----------------------------------------------------------------- | ------------- |
 | `--debug`                | enables debug logs                                                | false         |
+| `--version`              | prints version and build information, exists                      | false         |
 | `--no-prefix`            | hide the informational comments generated in the output html      | false         |
 | `--no-template`          | write html output to a file without the default html scaffolding  | false         |
 | `--silent`               | disables all info logs, keeps warnings and errors                 | false         |