readme: Modernize build and installation instruction

.gitignore

-build*
+build*/
 Xcode/*
 *~
 *.pyc

INSTALL

-
-Dependencies:
-============
-
- - Eigen
- - Boost (thread, date_time, filesystem)
- - assimp
- - octomap (optional dependency, available at http://octomap.github.io)
- - Qhull (optional dependency, available at http://www.qhull.org)
-
-Boost and Eigen are mandatory dependencies. If Octomap is not found,
-collision detection with octrees will not be possible.
-
-For installation, CMake will also be needed (http://cmake.org).
-
-Test dependencies:
-=================
-
-When building tests (BUILD_TESTING=ON), additional dependencies are required:
-  - Boost (unit_test_framework, timer)
-
-Install:
-=======
-
-* Linux / Mac OS:
-  The CMakeLists.txt can be used to generate makefiles; For example, one may use operations such as:
-
-  mkdir build
-  cd build
-  cmake ..
-  make -jN # N is the maximum number of parallel compile jobs
-
-Once the compilation is finished,
-  make install
-will install the project. To specify the installation prefix,
-pass the parameter -DCMAKE_INSTALL_PREFIX=/my/prefix/ to the "cmake .." command above.
-
-
-* Visual Studio:
-  The CMakeLists.txt can be used to generate a Visual Studio project, using the cmake build tool.

NEWS

-                                                                -*- outline -*-
-New in 1.1.1
-* Fix a bug in assimp loading procedure.
-New in 1.1.0
-* Fix uninitialized closest points in capsulePlaneIntersect.
-* Refactor sphereTriangleIntersect.
-* Initialize closest points to nan value in distance query
-* Add Converter from AABB to OBBRSS.
-* Add node type as attribute of MeshLoader.
-* Simplify box - sphere distance computation.
-* Implement GJKSolver_indep::shapeIntersect for sphere - box
-* Fix MeshShapeCollisionTraversalNodeOBB.
-* Add missing include guard in fwd.hh/
-
-New in 1.0.2
-* A lot of cleaning among functions that were not used
-  - broadphase has been removed,
-  - cost and cost source have been removed,
-
-* CollisionRequest is passed to low level functions in order to unify
-    - the calling function tree among the various possible options,
-
-* Collision test triangle - triangle
-  - in GJK, a detection of loop that made the algorithm fail to detect
-    collision has been removed,
-  - collision and distance computation between triangles in
-    MeshCollisionTraversalNode::leafTesting now uses GJK
-  - a test on triangle - triangle interaction has been added optimality of
-    closest points is check using Karush-Kuhn-Tucker conditions.
-
-New in 1.0.1
-* Fix octomap version handling,
-  - add flags related to Octomap in pkg-config file.

README.md

@@ -69,6 +69,20 @@ One can observe that GJK-based approaches largely outperform solutions based on
 - [Jiminy](https://github.com/duburcqa/jiminy) A simulator based on Pinocchio.
 - [ocs2](https://github.com/leggedrobotics/ocs2) A toolbox for Optimal Control for Switched Systems (OCS2)
 
+## Installation
+
+### Conda
+
+Coal can be installed from the [conda-forge channel](https://anaconda.org/conda-forge/coal):
+
+```bash
+conda install coal -c conda-forge
+```
+
+## Build
+
+You can find build instruction [here](./development/build.md).
+
 ## C++ example
 Both the C++ library and the python bindings can be installed as simply as `conda -c conda-forge install coal`.
 The `.so` library, include files and python bindings will then be installed under `$CONDA_PREFIX/lib`, `$CONDA_PREFIX/include` and `$CONDA_PREFIX/lib/python3.XX/site-packages`.

development/build.md

+# Build and install from source with Pixi
+
+To build Coal from source the easiest way is to use [Pixi](https://pixi.sh/latest/#installation).
+
+[Pixi](https://pixi.sh/latest/) is a cross-platform package management tool for developers that
+will install all required dependencies in `.pixi` directory.
+It's used by our CI agent so you have the guarantee to get the right dependencies.
+
+Run the following command to install dependencies, configure, build and test the project:
+
+```bash
+pixi run test
+```
+
+The project will be built in the `build` directory.
+You can run `pixi shell` and build the project with `cmake` and `ninja` manually.
+