[#42646143] Refactor code between plate and container
[#42646143] Move well to_s in receptacle
[#42646143] Refactoring
[#42646143] Add TubeRack class
add find by label spec. *

* Should use a dedicated class instead of Multicriteria filter.
Would probably needs as well to be moved in a shared example.
Lookup plate by label works but break others. *

* Needs refactoring
[#42646143] Add tube rack spec
Add pack/unpac_uuid to Labellable persistors
[#42646143] Rename well to element
[#42646143] Overwrite []= method to add tube in the rack
[#42646143] Fix plate specs to use container methods
[#42646143] Small fixes
[#42646143] Error if a tube is replaced by an other one in the rack
All spec passes. needs refactoring
Refactor label filter specs
Share label filtrage specs.
[fixes #42211553] Use label filter in CreateSearch
Merge pull request #79 from maxigit/42211553_lookup_labellabe_by_barcode

42211553 lookup labellabe by barcode
Bump version to 0.20.0 and update doc
Move un/pack_uuid methods