feat: Add basic MemoryManager to track buffered dataframes for out-of-core support later

[azimafroozeh]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 73.60775% with 109 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.39%. Comparing base (2892ced) to head (8b4434b).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-ooc/src/memory_manager.rs	75.13%	45 Missing ⚠️
crates/polars-config/src/spill_policy.rs	18.18%	18 Missing ⚠️
crates/polars-config/src/parse.rs	0.00%	14 Missing ⚠️
crates/polars-config/src/spill_format.rs	23.52%	13 Missing ⚠️
crates/polars-ooc/src/spiller.rs	27.27%	8 Missing ⚠️
crates/polars-ooc/src/token.rs	83.33%	3 Missing ⚠️
crates/polars-error/src/lib.rs	0.00%	2 Missing ⚠️
crates/polars-stream/src/nodes/joins/mod.rs	81.81%	2 Missing ⚠️
crates/polars-stream/src/nodes/multiplexer.rs	66.66%	2 Missing ⚠️
crates/polars-python/src/error.rs	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@           Coverage Diff            @@
##             main   #26443    +/-   ##
========================================
  Coverage   81.38%   81.39%            
========================================
  Files        1792     1800     +8     
  Lines      244414   245318   +904     
  Branches     3078     3079     +1     
========================================
+ Hits       198913   199669   +756     
- Misses      44715    44863   +148     
  Partials      786      786            

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