fix: handle decimal string input in intword()

[jtvhd6]

Bug: intword("12400.9") returns "12400.9" instead of "12.4 thousand" because int("12400.9") raises a ValueError in Python.
Fix: Changed value = int(value) to value = int(float(value)) so decimal strings are handled correctly, consistent with how intcomma() already handles this case.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.55%. Comparing base (c2c410c) to head (4f0797a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #332   +/-   ##
=======================================
  Coverage   99.55%   99.55%           
=======================================
  Files          12       12           
  Lines         900      900           
=======================================
  Hits          896      896           
  Misses          4        4           

Flag	Coverage Δ
macos-latest	97.55% <100.00%> (ø)
ubuntu-latest	97.55% <100.00%> (ø)
windows-latest	95.66% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[codspeed-hq]

Merging this PR will not alter performance

✅ 15 untouched benchmarks

---

_{Comparing jtvhd6:main (4f0797a) with main (c2c410c)}

[hugovk]

Thanks for the PR, please could you add test cases that failed before and pass with this fix?

For example, ("1234.5", "1.2 thousand") and ("1234.9", "1.2 thousand") to test_intword.