Enable year ranges in input files

[dalonsoa]

Description

Enable defining multiple consecutive years as a range in the input file as start..end. If provided, the limits of the range are both inclusive. If either is missing, they are made equal to the start or end of the valid range provided, respectively.

Todo

• Adapt existing input files to use time range, where relevant -> there are none
• Update documentation to explain this option -> schemas updated

Fixes #845

Type of change

• Bug fix (non-breaking change to fix an issue)
• New feature (non-breaking change to add functionality)
• Refactoring (non-breaking, non-functional change to improve maintainability)
• Optimization (non-breaking change to speed up the code)
• Breaking change (whatever its nature)
• Documentation (improve or add documentation)

Key checklist

• All tests pass: $ cargo test
• The documentation builds and looks OK: $ cargo doc

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

❌ Patch coverage is 97.36842% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.07%. Comparing base (58d11c3) to head (d118339).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
src/year.rs	97.36%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1017      +/-   ##
==========================================
+ Coverage   80.99%   81.07%   +0.08%     
==========================================
  Files          52       52              
  Lines        6299     6331      +32     
  Branches     6299     6331      +32     
==========================================
+ Hits         5102     5133      +31     
  Misses        942      942              
- Partials      255      256       +1     

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[tsmbland]

I've made a small change to disallow having multiple ".."s in a range (e.g. "..2020..2030"), but otherwise all good!