* Move health/ under src/
* Update references to health paths.
```
find . -type f -exec sed -i 's:master/exporting:master/src/exporting:g' {} \;
```
* Update .git{,hub} refs to health.
* make the title metadta the H1
* Update collectors/python.d.plugin/zscores/README.md
* Update libnetdata/ebpf/README.md
* Update ml/README.md
* Update libnetdata/string/README.md
---------
Co-authored-by: Chris Akritidis <43294513+cakrit@users.noreply.github.com>
* fix broken link in ml/README.md
* fix broken link across all files
* fix broken link across all files
* fix broken links and remove what's next sections
* fix broken links and remove what's next section
* Remove related links sections with broken links that link to removed files
* fix broken links
* Move export graphite metrics guide content to new integrations landing
page and exporter readme
* Merge info on how to write python collector and reorg file
* Codacy warning fixes