[PWGLF] Update on Xi1820 Analysis and add the Armenteros-Qt, Alpha info. on the ResoV0s table

[mjkim525]

This update includes a V0 table update and minor fixes in the resonance initializer, as well as an analysis code update in xi1820analysis.cxx.

----- Resonance initializer -----
• Added Armenteros–Podolanski variables (qT and α) to the ResoV0 table.
• Removed the INFO log message that was printed while constructing the Reso-MCV0s and Cascades tables.

----- xi1820analysis.cxx -----
• Added the acceptance × efficiency evaluation block.
Charged kaon cuts
• Applied pT-dependent DCAxy and DCAz cuts.

Lambda cuts
• Added a K0S mass rejection cut.
• Added an Armenteros–Podolanski cut.

K0S cuts
• Made the Λ mass rejection cut configurable.
• Added an Armenteros–Podolanski cut.

Charged K + Λ channel analysis
• Added a guard to skip track-level analysis when either track table has fewer than 2 entries.
• Added a rapidity cut for reconstructed Ξ(1820) candidates, with a configurable parameter.
• Added the MC-reco part needed to compute acceptance × efficiency.
• Fixed a bug in the event-mixing pool construction.

K0S + Λ channel analysis
• Added a guard to skip V0-level analysis when the V0 track table has fewer than 2 entries.
• Added a check to skip combinations where the K0S candidate index is the same as the Λ candidate index.
• Added the MC-reco part needed to compute acceptance × efficiency.
• Fixed a bug in the event-mixing pool construction.