Update dev guide (#5810)

* Write instructions on running the test suite
* Add troubleshooting tips on pre-commit
* Update guide on implementing new distributions
* Update dev guide introduction
* Reformat developer guide as Markdown with one sentence per line
* Replace internal links
* Fix class links
* Orphanize dev guid and resolve merge conflicts
* Update versioning explanation

Co-authored-by: Oriol Abril-Pla <[email protected]>

Author: michaelosthege

.pre-commit-config.yaml

@@ -95,8 +95,7 @@ repos:
           (?x)(index.md|
                404.md|
                contributing/release_checklist.md|
-               contributing/developer_guide.rst|
-               contributing/versioned_vs_gallery_explanation.md|
+               contributing/versioning_schemes_explanation.md|
                learn/examples.md)
       entry: >
           (?x)(arviz-devs.github.io|