docs: add a list of external tools (WIP)

docs/EXTERNAL_TOOLS.md

@@ -0,0 +1,37 @@
+# External Tools
+To get the maximum out of this configuration, you would need to install some
+external tools, either in your development machine, docker, remote host, etc.
+The presence of these programs isn't mandatory, however, for better experience,
+you might need install some of these tools.
+
+1. [`gcc`](https://gcc.gnu.org) - The GNU Compiler for  C
+2. [`g++`](https://gcc.gnu.org) - The GNU Compiler for C++
+3. [`objdump`](https://en.wikipedia.org/wiki/Objdump) (`binutils`) - A tool to display information from object files
+4. [`git`](https://git-scm.com) - The stupid content tracker
+5. [`clangd`](https://clangd.llvm.org) - A C/C++ language server that provides IDE-like features to editors
+6. [`ccls`](https://github.com/MaskRay/ccls) - C/C++/Objective-C language server
+7. [`pyright`](https://github.com/microsoft/pyright) - LSP server for Python
+8. [`clang-format`](https://clang.llvm.org/docs/ClangFormat.html) - A tool to format C/C++/Java/JavaScript/JSON/Objective-C/Protobuf/C# code
+9. [`shfmt`](https://github.com/mvdan/sh) - A tool to format shell programs
+10. [`black`](https://github.com/psf/black) - The uncompromising code formatter for Python
+11. [`ltex-ls`](https://github.com/valentjn/ltex-ls) - LTeX Language Server based on Language Tool
+12. [`xmllint`](https://github.com/GNOME/libxml2) - Parse the XML files and output the result of the parsing
+13. [`jq`](https://jqlang.github.io/jq) - A lightweight and flexible command-line JSON processor
+14. [`yaml-language-server`](https://github.com/redhat-developer/yaml-language-server) - Language Server for YAML files
+15. [`lemminx`](https://github.com/eclipse/lemminx) - Eclipse XML language server
+16. [`gdb`](https://www.sourceware.org/gdb) - The GNU Debugger
+17. [`lldb`](https://lldb.llvm.org) - The LLDB Debugger
+18. [`bash-language-server`](https://github.com/bash-lsp/bash-language-server) - LSP for Bash/Shell
+19. [`sqlformat`](https://sqlformat.org) - SQL formatter
+20. [`sqlfluff`](https://sqlfluff.com) - SQLFluff is a modular SQL linter for humans
+21. [`docker`](https://www.docker.com) - A self-sufficient runtime for containers
+22. [`rtags`](https://github.com/Andersbakken/rtags) - A client/server indexer for C/C++/ObjC[++] with integration for Emacs based on Clang
+23. [`ctags`](https://github.com/universal-ctags/ctags) - Universal Ctags (abbreviated as u-ctags) is a maintained implementation of ctags
+24. [`cscope`](https://cscope.sourceforge.net) - Interactively examine a C program
+25. [`clink`](https://github.com/Smattr/clink) - A modern re-implementation of Cscope based on Clang
+26. [`bear`](https://github.com/rizsotto/Bear) - A tool that generates a compilation database for Clang tooling
+27. [`cmake`](https://cmake.org) - A Powerful Software Build System
+28. [`make`](https://www.gnu.org/software/make) - GNU Make utility to maintain groups of programs
+29. [`autoconf`](https://www.gnu.org/software/make) - Generate configuration script
+30. [`aspell`](http://aspell.net) - Interactive spell checker
+31. [`enchant-2`](https://github.com/AbiWord/enchant) - A generic spell checker