FBIde 0.5.0.rc-3

Changes since 0.5.0.rc-2.

• Added macOS builds (Apple Silicon and Intel .dmg).
• Added change tracking (#1).
• Added a confirm-and-close prompt when Save As targets a file already open in another tab.
• Added basic Markdown syntax highlighting for .md / .markdown files.
• Added basic Windows batch syntax highlighting for .bat / .cmd files.
• Added basic shell script syntax highlighting for .sh / .bash files.
• Added basic Makefile syntax highlighting (Makefile, GNUmakefile, .mk, .make).
• Added basic JSON syntax highlighting for .json / .json5 files.
• Added basic CSS syntax highlighting for .css files.
• Added a document type indicator to the status bar.
• Added option to override document type (right click on type indicator in the status bar).
• Changed FBIde now stores config changes in .local., keeping original base files immutable.
• Fixed #include opening the same file in multiple tabs on case-insensitive filesystems (#87).
• Fixed issue with folding where the opener was followed by empty lines.