linux build

[humbertodias]

Changes

• Added Linux-specific files.
• Added continuous integration ci.yml triggered on every push to the main branch.
• Added continuous delivery cd.yml triggered when a v* tag is created.
• Add prism submodule PR#2
  replace your github account into .gitmodules after merging this PR

[submodule "external/prism"]
        path = external/prism
        url = https://github.com/humbertodias/prism.git

• Added a status badge to README.md

https://github.com/humbertodias/DolmexicaInfinite/releases

How to test

git clone --branch linux --recurse-submodules https://github.com/humbertodias/DolmexicaInfinite
make -f Makefile.linux
file Dolmexica_Infinite_Linux

Dolmexica_Infinite_Linux: ELF 64-bit LSB pie executable, x86-64, version 1 (GNU/Linux), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=533b4e4d56112c4d94f9cb1f592d50e41ca9287f, for GNU/Linux 3.2.0, not stripped

Dolmexica_Infinite_Linux.mp4