Release MBX v1.3.3

[Miniland1333]

Patch release in preparation for upcoming LAMMPS integration.

Closes #101
Adds some autoreconf build artifacts to repo.
Contains numerous minor bugfixes.

[Copilot]

Pull Request Overview

This PR prepares MBX v1.3.2 for LAMMPS integration by adding autoreconf build artifacts and addressing various minor bugfixes. The key changes include:

• Version bump from 1.3.0 to 1.3.2
• Addition of generated build system files (Makefile.in, config.h.in, build-aux scripts)
• MPI compatibility improvements
• Removal of unused variables
• Code cleanup and API enhancements

Reviewed Changes

Copilot reviewed 34 out of 38 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
configure.ac	Version updated to 1.3.2, C++17 enabled by default, added pkg-config and version header generation
src/bblock/external_call.cpp	Fixed typo, added energy decomposition API functions
src/bblock/system.h	Added static version getter function
src/main/normal-modes.cpp	Fixed argument count check, changed atoi to stoi
src/potential/*/h files	Improved MPI compatibility checks
src/potential/dispersion/*	Removed unused maxnmon variable
src/potential/3b/poly-3b-v2x.cpp	Fixed malformed string literals in debug output
plugins/lammps/USER-MBX/*	Updated C++ standard to C++17, fixed shell script syntax
src/Makefile.am	Reorganized header lists for clarity
plugins/python/mbx/mbx.py	Added energy decomposition functions
README.md	Updated version, clarified realspace_cutoff documentation

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

[nitpick] The .gitignore previously excluded Makefile.in, but this file is now being added to the repository as a build artifact. While this is intentional for this release, it's worth noting that typically generated files like Makefile.in are not committed. However, this appears to be a deliberate decision for the autoreconf artifacts.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.47%. Comparing base (56100d3) to head (e0acb0d).
⚠️ Report is 244 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #102      +/-   ##
==========================================
+ Coverage   93.41%   93.47%   +0.06%     
==========================================
  Files         103      104       +1     
  Lines       61130    61212      +82     
==========================================
+ Hits        57102    57220     +118     
+ Misses       4028     3992      -36     

Flag	Coverage Δ
	?

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

☔ View full report in Codecov by Sentry.
📢 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.