document why i did this thing

README.md

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+# args
+
+args is a simple command line tool that lists out each positional argument that it receives
+
+
+## why?
+
+i created it to help me understand word-splitting and quote removal in shells
+
+## how do i use it?
+
+```console
+$ args one two three
+@1  one
+@2  two
+@3  three
+
+$ # the second argument doesn't get split because of the quotes
+$ args one 'a world of spaces'
+@1  one
+@2  a world with spaces
+
+$ # NOTE: empty arguments are presented as ''
+$ args ''
+@1  ''
+
+$ # words are split, quoting removed
+$ args $(echo hello \"world\")
+@1  hello
+@2  "world"
+
+$ # words aren't split because $() is quoted
+$ args "$(echo hello \"world\")"
+@1  hello "world"
+```
+## how do i install it?
+
+```console
+$ cd [a reasonable place]
+$ #     |_ personally i create and use ~/.local/src
+$ git clone https://gitea.kevinnlsamuel.com/kevinnlsamuel/args.git --depth 1
+$ cd args
+$ make build install
+```