Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6677
Relative links in docs are much harder to maintain in consistent state comparing to absolute links:
- It is non-trivial to figure out the proper relative link path when creating and editing docs.
- Relative links break after moving the doc files to another paths, and it is non-trivial
to figure which links are broken after that.
See also f357ee57ef , d5809f8e12 and 8cb1822b94
### Describe Your Changes
- moved files from root to VictoriaMetrics folder to be able to mount
operator docs and VictoriaMetrics docs independently
- added ability to run website locally
### Checklist
The following checks are **mandatory**:
- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
### Describe Your Changes
Small improvements to a QuickStart guide of `vmanomaly`
### Checklist
The following checks are **mandatory**:
- [x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
- Fixed config example in QuickStart vmanomaly docs for 1.13 version
compatibility
- [x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
* docs/vmanomaly: v1.12.0 & link updates
* add autotuned description to model section
* - update refs of vmanomaly on enterprise and vmalert pages
- add diagrams for model types
- update self-monitoring section
* - fix typos
- remove .index.html from links
