Add getCsrfTokenFromRequest util

[LoicPoullain]

See #1134

[codecov-commenter]

Codecov Report

Merging #1138 (33fb60f) into v2-10-2 (3775ea7) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           v2-10-2    #1138   +/-   ##
========================================
  Coverage    98.94%   98.94%           
========================================
  Files           93       94    +1     
  Lines         1706     1707    +1     
  Branches       406      404    -2     
========================================
+ Hits          1688     1689    +1     
  Misses          18       18           

Impacted Files	Coverage Δ
...e/src/sessions/http/get-csrf-token-from-request.ts	100.00% <100.00%> (ø)
...ckages/core/src/sessions/http/use-sessions.hook.ts	100.00% <100.00%> (ø)

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