deps: add jinja2

[cpaniaguam]

Add jinja2 and pandas for templating.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0946979) 91.84% compared to head (319b060) 90.48%.
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #346      +/-   ##
==========================================
- Coverage   91.84%   90.48%   -1.37%     
==========================================
  Files          29       29              
  Lines         871      904      +33     
==========================================
+ Hits          800      818      +18     
- Misses         71       86      +15     

Files	Coverage Δ
src/IceFloeTracker.jl	100.00% <100.00%> (ø)

... and 3 files with indirect coverage changes

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[tdivoll]

This looks good to me, pretty straightforward.