fix(issue-300): template path translation

[ivankatliarchuk]

WIP for issue #300

• optimise function getFiles from N^2 to N. This optimization should improve performance and memory usage of the function

Instead of initializing filesSet with a capacity, it's now initialized as an empty slice (var filesSet []string). This avoids reallocating the underlying array when appending elements.

The problem is identified

when running all tests

the path is template "with-subchart/charts/child-chart/templates/deployment.yaml"

when running specific test

the path is template "with-subchart/templates/deploymentent.yaml"