feat: 3657 - blue banner on bottom end when in "TEST ENV"

[monsieurtanuki]

Impacted file:

• page_manager.dart: blue banner on bottom end when in "TEST ENV"

What

• blue banner on bottom end when in "TEST ENV"

Screenshot

Fixes bug(s)

• Closes: Make it very visible when the app is accessing the TEST mode instead of PROD (e.g. corner banner) #3657

[codecov-commenter]

Codecov Report

Merging #3660 (be96bd7) into develop (b013a9a) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #3660      +/-   ##
===========================================
- Coverage    10.64%   10.63%   -0.01%     
===========================================
  Files          270      270              
  Lines        13484    13487       +3     
===========================================
  Hits          1435     1435              
- Misses       12049    12052       +3     

Impacted Files	Coverage Δ
packages/smooth_app/lib/pages/page_manager.dart	1.66% <0.00%> (-0.09%)	⬇️

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[teolemon]

🔬 👌

[monsieurtanuki]

Thank you @teolemon for the review!

[stephanegigandet]

Thank you @monsieurtanuki !

[alexgarel]

Yop, used it today, a big thanks 😄