Add `getCsrfTokenFromRequest` util

[LoicPoullain]

Issue

The @UseSessions and @JWT hooks do too much stuff and so the tests are difficult to maintain and modify.

Solution and steps

• [x] Add a getCsrfTokenFromRequest util to externalize this part.

Checklist

• [x] Add/update/check docs (code comments and docs/ folder).
• [x] Add/update/check tests.
• [x] Update/check the cli generators.

[codecov-commenter]

Codecov Report

Merging #1134 (9691960) into v3-0-0 (cf846d7) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           v3-0-0    #1134   +/-   ##
=======================================
  Coverage   98.86%   98.86%           
=======================================
  Files          96       97    +1     
  Lines        1763     1764    +1     
  Branches      422      420    -2     
=======================================
+ Hits         1743     1744    +1     
  Misses         20       20           

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	98.80% <100.00%> (-0.02%)	:arrow_down:

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