[DE-665]: GET /_api/transaction

[aMahanna]

• Introduces list_transactions() to list the running stream transactions

[codecov-commenter]

Codecov Report

Merging #283 (fde83e4) into main (744a6e9) will decrease coverage by 0.50%.
Report is 18 commits behind head on main.
The diff coverage is 93.33%.

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@@ Coverage Diff @@ ## main #283 +/- ## ========================================== - Coverage 99.01% 98.51% -0.50%  ========================================== Files 26 26 Lines 3958 4040 +82 ========================================== + Hits 3919 3980 +61  - Misses 39 60 +21 

Files Changed	Coverage Δ
arango/client.py	98.41% <ø> (ø)
arango/http.py	100.00% <ø> (ø)
arango/database.py	99.22% <87.50%> (-0.64%)	⬇️
arango/collection.py	97.41% <92.92%> (-1.09%)	⬇️
arango/exceptions.py	100.00% <100.00%> (ø)
arango/request.py	94.44% <100.00%> (ø)
arango/utils.py	87.50% <100.00%> (-12.50%)	⬇️

... and 2 files with indirect coverage changes

[apetenchea]

LGTM