feat: IR serde

[ritchie46]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 10 lines in your changes missing coverage. Please review.

Project coverage is 80.20%. Comparing base (42b99e9) to head (fcfe420).
Report is 31 commits behind head on main.

Files	Patch %	Lines
crates/polars-plan/src/plans/aexpr/mod.rs	0.00%	2 Missing ⚠️
crates/polars-plan/src/plans/expr_ir.rs	0.00%	2 Missing ⚠️
crates/polars-utils/src/arena.rs	0.00%	2 Missing ⚠️
crates/polars-core/src/frame/explode.rs	0.00%	1 Missing ⚠️
crates/polars-plan/src/plans/functions/mod.rs	0.00%	1 Missing ⚠️
crates/polars-plan/src/plans/ir/mod.rs	0.00%	1 Missing ⚠️
crates/polars-plan/src/plans/options.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18298      +/-   ##
==========================================
- Coverage   80.22%   80.20%   -0.03%     
==========================================
  Files        1501     1501              
  Lines      198934   198944      +10     
  Branches     2837     2837              
==========================================
- Hits       159595   159557      -38     
- Misses      38811    38859      +48     
  Partials      528      528              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.