Fix x-axis address overflow

[Farhan-25]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository.
• I made sure to follow the project's coding style.
• I've documented every RZ_API function and struct this PR changes.
• I've added tests that prove my changes are effective (required for changes to RZ_API).
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Detailed description

Introduced a variable space which shows the usable width for ticks — data_cols - addr_w, so the last tick's label doesn't overflow past the right edge (falls back to 1 if the chart's too narrow).

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Test plan
Before

After

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Closing issues

closes #6550

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[Rot127]

Check tests please

[Rot127]

These kind of tests fail so weirdly because they differ in the escaped bytes.
You can download the full test log and check the byte content to your local one with rz-diff to see what escaped bytes differ.

[Farhan-25]

Yes i got a way to fix them rz-test -i -C will push the correct commit in just a min.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.00%. Comparing base (a57652c) to head (eaf2429).
⚠️ Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
librz/cons/histogram.c	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
librz/cons/histogram.c	69.58% <50.00%> (-0.37%)	⬇️

... and 16 files with indirect coverage changes

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