feat(flemarr): add flemarr (#3808)

* feat(flemarr): add flemarr

* required

* no service, persistence, portal

* no ingress

* add description

* add ci values

* lint

* lint

* Apply suggestions from code review

Signed-off-by: Stavros Kois <47820033+stavros-k@users.noreply.github.com>

* lint

* Update charts/incubator/flemarr/values.yaml

Signed-off-by: Stavros Kois <47820033+stavros-k@users.noreply.github.com>

Signed-off-by: Stavros Kois <47820033+stavros-k@users.noreply.github.com>

charts/incubator/flemarr/docs/validation.md

@@ -0,0 +1,13 @@
+# Input Validation
+
+**`Config File Host Path`**
+Accepted formats are:
+
+- Valid filesystem paths (eg. `/mnt/path/to/config.yml`)
+
+Regex used to match those: `^\/([a-zA-Z0-9._-]+(\s?[a-zA-Z0-9._-]+|\/?))+$`
+You can try live [here](https://regex101.com/r/9gwRQK/1)
+
+---
+
+_If you find a field that you think it needs validation, please open an issue on github_