feat: mesh patch iterators

[ciscorn]

No description provided.

[Copilot]

Pull Request Overview

This PR adds mesh patch iterators to the gridsquare module and updates the naming of the bounding box method from "patch" to "envelope" for consistency. Key changes include:

• Adding a new iterator module (src/gridsquare/iterator.rs) that provides iterators for various mesh levels.
• Introducing an intersects_box method in LngLatBox (src/gridsquare/lnglat.rs) along with updating tests.
• Renaming the method patch to envelope in the GridSquareCode trait and related implementations in src/gridsquare/code.rs, and minor README updates.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/gridsquare/mod.rs	Introduces the iterator module.
src/gridsquare/lnglat.rs	Adds a new intersects_box method for LngLatBox.
src/gridsquare/iterator.rs	Implements iterators for primary, secondary, standard, half, quarter, and eighth envelopes.
src/gridsquare/code.rs	Renames patch to envelope in the GridSquareCode trait and updates related iterator method signatures.
README.md	Updates the feature list with a new examples entry.

Comments suppressed due to low confidence (1)

src/gridsquare/code.rs:152

• The documentation for the GridSquareCode trait should be updated to reflect the new method name and semantics (from patch to envelope) to avoid confusion.

fn envelope(&self) -> LngLatBox {

[Copilot]

Using unwrap here may lead to a panic if a code conversion fails; consider handling the error gracefully or adding a comment noting the assumption that codes are always valid.

Suggested change

	.map(|&code| PrimaryCode::from_int(code).unwrap())
	.filter_map(|&code| PrimaryCode::from_int(code).ok())

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.12%. Comparing base (79e9237) to head (46d27fe).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #2      +/-   ##
==========================================
+ Coverage   95.55%   96.12%   +0.57%     
==========================================
  Files           2        3       +1     
  Lines         787      903     +116     
==========================================
+ Hits          752      868     +116     
  Misses         35       35              

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