Remove unnecessary Boost dependencies and update documentation

[simogasp]

• Remove unnecessary Boost libraries: atomic, chrono, system , thread and math_c99
  • this is in anticipation of the deprecation of findBoost: only non-header libraries are associated with targets, the header-only must be included via target_include_directories(). This is a bummer because we lose track of the components that are actually used.
• Update the INSTALL documentation with the badges, README, and other doc with markdown linting.
• Removed old travis ci files aa7b7f1

[philippremy]

Hi! Quick question:
IIRC Boost provides the special target Boost::headers for all its header libraries. Would it make sense to use that instead of setting the include dirs manually?

[Copilot]

Pull request overview

This PR reduces compiled Boost dependencies in the build system (anticipating FindBoost changes), refreshes/markdown-lints project documentation, and removes legacy Travis CI artifacts.

Changes:

• Prune Boost components and linked Boost targets across top-level, library, and applications CMake.
• Update README/INSTALL/CONTRIBUTING/CODE_OF_CONDUCT/CHANGES markdown formatting and links.
• Remove old Travis CI config and related CI helper scripts.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/applications/regression/Regression.cpp	Adjusts optional CUDA parameter handling in regression runner.
src/applications/detection/main.cpp	Removes an unused Boost exception include.
src/applications/CMakeLists.txt	Reduces required Boost components for applications build.
src/CMakeLists.txt	Removes several Boost link dependencies from the core library target.
CMakeLists.txt	Updates global Boost component list and clarifies header-only handling.
INSTALL.md	Refreshes dependency/install docs and markdown formatting.
README.md	Updates badges/formatting and modernizes markdown structure.
CONTRIBUTING.md	Reformats contributing guide to markdown headings/lists.
CODE_OF_CONDUCT.md	Updates link/email formatting for markdown linting.
CHANGES.md	Markdown list/link normalization.
ci/install-dependencies.sh	Removes legacy Travis dependency install script.
ci/install-cmake.sh	Removes legacy Travis CMake install script.
ci/env.sh	Removes legacy Travis environment helper script.
.travis.yml	Removes Travis CI configuration.

---

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