Update release notes and version for 3.1.4

[quaquel]

Update version and release notes for the next feature release, Mesa 3.1.4.

See the release notes

## Highlights
This release contains various improvements and bugfixes to the matplotlib-based visualization of spaces. Hexgrids are now fully supported, including property layers. In making this possible various minor bugs were encoutered and also fixed. In addition to the visualization improvements, there are various minor convenience improvements to the docs.


## What's Changed
### 🛠 Enhancements made
* Fixed hex-space draw function to avoid overlaps by @Sahil-Chhoker in https://github.com/projectmesa/mesa/pull/2609
* Enhance DataCollector to validate model_reporters functions by @peter-kinger in https://github.com/projectmesa/mesa/pull/2605
### 🐛 Bugs fixed
* bugfix for draw_property_layer by @quaquel in https://github.com/projectmesa/mesa/pull/2639
* Uses array for hex grid property layer fix by @Sahil-Chhoker in https://github.com/projectmesa/mesa/pull/2651
* Update Binder environment to use latest Mesa version (#2652) by @aarav-shukla07 in https://github.com/projectmesa/mesa/pull/2655
### 🔍 Examples updated
* Added property layer viz to sugarscape by @sanika-n in https://github.com/projectmesa/mesa/pull/2653
### 📜 Documentation improvements
* remove any reference to using --pre by @quaquel in https://github.com/projectmesa/mesa/pull/2618
* Updated Docs by @sanika-n in https://github.com/projectmesa/mesa/pull/2624
* Fixed 404 error for Examples Tab in Introductory Tutorial (#2662) by @aarav-shukla07 in https://github.com/projectmesa/mesa/pull/2664
### 🔧 Maintenance
* remove remnants of mesa cli by @quaquel in https://github.com/projectmesa/mesa/pull/2617
* benchmarks.yml: Install SciPy and use uv for pip install by @EwoutH in https://github.com/projectmesa/mesa/pull/2633
### Other changes
* added color-bar for spice by @sanika-n in https://github.com/projectmesa/mesa/pull/2622
* Documentation by @Spartan-71 in https://github.com/projectmesa/mesa/pull/2630
* Adding a copy option at the top of the code written in the docs by @PrashantChoudhary13579 in https://github.com/projectmesa/mesa/pull/2628
* Change Hexgrid._connect_cells_2d to use x,y coordinates by @quaquel in https://github.com/projectmesa/mesa/pull/2632
* Fix: Property layer visualization for HexGrid by @Sahil-Chhoker in https://github.com/projectmesa/mesa/pull/2646
* Implemented post_process in Altair based components by @sanika-n in https://github.com/projectmesa/mesa/pull/2641
* Fix: Alpha for colormaps in HexGrid by @Sahil-Chhoker in https://github.com/projectmesa/mesa/pull/2660
* Adding Mesa Extension page by @PrashantChoudhary13579 in https://github.com/projectmesa/mesa/pull/2627
* [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in https://github.com/projectmesa/mesa/pull/2659

## New Contributors
* @PrashantChoudhary13579 made their first contribution in https://github.com/projectmesa/mesa/pull/2628
* @aarav-shukla07 made their first contribution in https://github.com/projectmesa/mesa/pull/2655
* @peter-kinger made their first contribution in https://github.com/projectmesa/mesa/pull/2605

**Full Changelog**: https://github.com/projectmesa/mesa/compare/v3.1.3...v3.1.4

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 +0.3% [-1.3%, +2.1%]	🔵 +0.4% [+0.1%, +0.6%]
BoltzmannWealth	large	🔵 -0.6% [-1.8%, +0.4%]	🔵 +0.9% [-0.5%, +2.4%]
Schelling	small	🔵 -0.1% [-0.4%, +0.2%]	🔵 +0.4% [+0.2%, +0.6%]
Schelling	large	🔵 +1.2% [+0.5%, +1.8%]	🔴 +7.8% [+6.3%, +9.2%]
WolfSheep	small	🔵 +0.6% [+0.2%, +1.0%]	🔵 +0.8% [+0.5%, +1.2%]
WolfSheep	large	🔵 -2.3% [-3.6%, -0.9%]	🔵 -5.0% [-7.4%, -2.0%]
BoidFlockers	small	🔵 -0.6% [-1.4%, +0.3%]	🔵 +1.9% [+1.5%, +2.3%]
BoidFlockers	large	🔵 -1.8% [-2.4%, -1.3%]	🔵 +0.1% [-0.3%, +0.4%]

[tpike3]

LGTM!

Very cool we got three new contributors!

[EwoutH]

Ideally all these PRs should get a label, so all fall in one of the categories.

[quaquel]

I have moved the other changes to the right category.

Is there a way to go back in and update these PRs? I assume I can just go to each PR and retrospective add the right label?

[EwoutH]

Highlights look good, one comment.

Thanks!