[#175441170] Add mailing component from io-functions-commons

[infantesimone]

This PR introduces the common mailing component developed here.

[pagopa-github-bot]

Affected stories

• 🌟 #175441170: Come ADM, vorrei poter caricare i loghi di servizi e organizzazioni, in modo autonomo, dal developer portal

Generated by 🚫 dangerJS

[codecov-io]

Codecov Report

Merging #102 into master will increase coverage by 1.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #102      +/-   ##
==========================================
+ Coverage   83.06%   84.20%   +1.14%     
==========================================
  Files          49       49              
  Lines        1671     1665       -6     
  Branches      126      124       -2     
==========================================
+ Hits         1388     1402      +14     
+ Misses        278      258      -20     
  Partials        5        5              

Impacted Files	Coverage Δ
SendUserDataDeleteEmailActivity/handler.ts	84.61% <100.00%> (+47.11%)	⬆️
utils/config.ts	72.72% <100.00%> (-2.28%)	⬇️

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