feat: add terramate.root.path.fs.basename/absolute

[katcipis]

Renames terramate root path metadata + adds basename. In the end we have the following metadata available:

• terramate.root.path.fs.absolute : The absolute path of the root of the project.
• terramate.root.path.fs.basename : The basename of the root project path, which is the project name.

[codecov]

Codecov Report

Merging #430 (8b8801f) into main (4a7b865) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #430      +/-   ##
==========================================
+ Coverage   69.73%   69.74%   +0.01%     
==========================================
  Files          42       42              
  Lines        7771     7775       +4     
==========================================
+ Hits         5419     5423       +4     
  Misses       2098     2098              
  Partials      254      254              

Flag	Coverage Δ
tests	69.74% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
stack/eval.go	100.00% <100.00%> (ø)

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[i4ki]

lgtm