[backend] add query to fetch documents

[Christian-DONGMO]

Proposed changes

Related issues

Checklist

• [x ] I consider the submitted work as finished
• [ ] I tested the code for its functionality
• [ ] I wrote test cases for the relevant uses case
• [ ] I added/update the relevant documentation (either on github or on notion)
• [x ] Where necessary I refactored code to improve the overall quality

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 25.00%. Comparing base (48d1105) to head (5fefa77). Report is 1 commits behind head on master.

Files	Patch %	Lines
...ain/java/io/openbas/rest/document/DocumentApi.java	0.00%	6 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #962      +/-   ##
============================================
- Coverage     25.32%   25.00%   -0.32%     
+ Complexity      961      956       -5     
============================================
  Files           466      466              
  Lines         10334    10333       -1     
  Branches        497      497              
============================================
- Hits           2617     2584      -33     
- Misses         7657     7690      +33     
+ Partials         60       59       -1     

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