Eyekit

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- Customizable panel borders in `Figure`
- `Fixation` now has an `index` property
- Improvements to `iter_pairs()`
- `number_of_regressions()` analysis function
- Customizable vertical padding around `InterestArea`
- Fixed some visualization bugs

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- `Image.draw_rectangle()` can now directly take an `InterestArea` object
- `number_of_fixations()` analysis function
- New `discard()` method
- Methods for manually setting and adjusting `InterestArea` padding
- Discarded fixations are now more clearly marked as such in JSON output
- Updated guide with more examples

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- Fixed bug causing non-left-aligned texts to be displayed incorrectly

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- `initial_landing_x()` renamed to `initial_landing_distance()` and is now measured from interest area onset (rather the bbox edge)
- Padding is now applied to all interest areas (not just those created with the `words()` method). Padding can be turned off using the new `autopad` TextBlock parameter.
- Interest areas are now cached on creation, so that they can be easily found by ID
- Better regex pattern matching in `words()` method

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- Better bidirectional text support
- Fixed some minor visualization bugs

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- Support for right-to-left languages and Arabic reshaping