0.4.2 - Add list template

What's Changed

• Add linked list template to generate code, including Koliseo-based allocation
  • Work in progress. May change or be removed soon.
• Rename internal KLS_Region_List functions
  • Adds rl_ to each identifier, after kls_
• Bump amboso to 2.0.5
• Bump invil to 0.2.9
• Bump scripts/bootstrap_anvil.sh to v0.2
• Refactor WINDOWS_BUILD preproc macros to use _WIN32
  • Closes #66
• Fix basic_example.c using <0.4.x macro signature
  • Closes #65
• Fix type arg in KLS_PUSH_T_ARR_NAMED() definition
  • Closes #68

PR - feat: 0.4.2 Add list template by @jgabaut

Full Changelog: 0.4.1...0.4.2