Enhancing K-Means initialization options (#286)

* rays dataset

* centred data fixes #118

* SKMeans: Add option for 'Forgy' initialiaation

* scrub old includes after rebase

* KMeans + SKMeans; Unify intialisation options

* change of interface name for clearer ux

* SKMeans: Add option for 'Forgy' initialiaation

* scrub old includes after rebase

* KMeans + SKMeans; Unify intialisation options

* rays dataset

* centred data fixes #118

* change of interface name for clearer ux

* KMeans test update args

* KMeans: follow conventional operation order

* KMeans: Calculate centroids  correctly

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Co-authored-by: tremblap <tremblap@gmail.com>
Co-authored-by: Pierre Alexandre Tremblay <pa@tas.local>
Co-authored-by: Pierre Alexandre Tremblay <info@pierrealexandretremblay.com>

Author: 3 people

Resources/Data/info.txt

@@ -7,3 +7,4 @@ Datasets:
 - line: A single thinly distributed line
 - mammoth: a 3d dataset in a shape of a mammoth (source: https://pair-code.github.io/understanding-umap/)
 - moon : Two overlapping crescent shapes
+- rays : Four rays as evenly distributed and clearly segregated slices, centred on zero.