[doc] documentation additions (#1358)

* Update readme.md to include code of conduct 

lack of code of conduct that was in the previous version of foam _1

* added the Contribution Guide 

this has a link to their Contribution Guide that is already on the foams website.

* Update readme.md presentation 

added See the before the contribution guide and code of conduct links to make it more professional

* Update readme.md

---------

Co-authored-by: Riccardo <[email protected]>

Author: Walshkev

readme.md

@@ -190,6 +190,16 @@ Foam is licensed under the [MIT license](LICENSE).
 [Backlinking]: docs/user/features/backlinking.md "Backlinking"
 [//end]: # "Autogenerated link references"
 
+## Contribution Guide
+
+See the [Contribution Guide](https://foambubble.github.io/foam/dev/contribution-guide)
+
+## Code of conduct
+
+See the [Code of Conduct](https://foambubble.github.io/foam/dev/code-of-conduct)
+
+
+
 ## Contributors ✨
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):