Add tokyo-moon theme variant (nushell#710)

Closes nushell#702. I was wrong in thinking the "night" and "storm" variants
should be much different — they're not. It's the divergent "moon"
variant between them that was missing. Added.

I have slight doubts about the darker gray `#828bb8` being used for e.g.
`ls` columns, but I think that basically correct. The high-contrast
foreground color `#c8d3f5` is the bright variant of that and should show
up in most other contexts I reckon.

themes/nu-themes/tokyo-moon.nu

@@ -0,0 +1,82 @@
+export def main [] { return {
+ separator: "#828bb8"
+ leading_trailing_space_bg: { attr: "n" }
+ header: { fg: "#c3e88d" attr: "b" }
+ empty: "#82aaff"
+ bool: {|| if $in { "#86e1fc" } else { "light_gray" } }
+ int: "#828bb8"
+ filesize: {|e|
+ if $e == 0b {
+ "#828bb8"
+ } else if $e < 1mb {
+ "#86e1fc"
+ } else {{ fg: "#82aaff" }}
+ }
+ duration: "#828bb8"
+ date: {|| (date now) - $in |
+ if $in < 1hr {
+ { fg: "#ff757f" attr: "b" }
+ } else if $in < 6hr {
+ "#ff757f"
+ } else if $in < 1day {
+ "#ffc777"
+ } else if $in < 3day {
+ "#c3e88d"
+ } else if $in < 1wk {
+ { fg: "#c3e88d" attr: "b" }
+ } else if $in < 6wk {
+ "#86e1fc"
+ } else if $in < 52wk {
+ "#82aaff"
+ } else { "dark_gray" }
+ }
+ range: "#828bb8"
+ float: "#828bb8"
+ string: "#828bb8"
+ nothing: "#828bb8"
+ binary: "#828bb8"
+ cellpath: "#828bb8"
+ row_index: { fg: "#c3e88d" attr: "b" }
+ record: "#828bb8"
+ list: "#828bb8"
+ block: "#828bb8"
+ hints: "dark_gray"
+ search_result: { fg: "#ff757f" bg: "#828bb8" }
+
+ shape_and: { fg: "#c099ff" attr: "b" }
+ shape_binary: { fg: "#c099ff" attr: "b" }
+ shape_block: { fg: "#82aaff" attr: "b" }
+ shape_bool: "#86e1fc"
+ shape_custom: "#c3e88d"
+ shape_datetime: { fg: "#86e1fc" attr: "b" }
+ shape_directory: "#86e1fc"
+ shape_external: "#86e1fc"
+ shape_externalarg: { fg: "#c3e88d" attr: "b" }
+ shape_filepath: "#86e1fc"
+ shape_flag: { fg: "#82aaff" attr: "b" }
+ shape_float: { fg: "#c099ff" attr: "b" }
+ shape_garbage: { fg: "#FFFFFF" bg: "#FF0000" attr: "b" }
+ shape_globpattern: { fg: "#86e1fc" attr: "b" }
+ shape_int: { fg: "#c099ff" attr: "b" }
+ shape_internalcall: { fg: "#86e1fc" attr: "b" }
+ shape_list: { fg: "#86e1fc" attr: "b" }
+ shape_literal: "#82aaff"
+ shape_match_pattern: "#c3e88d"
+ shape_matching_brackets: { attr: "u" }
+ shape_nothing: "#86e1fc"
+ shape_operator: "#ffc777"
+ shape_or: { fg: "#c099ff" attr: "b" }
+ shape_pipe: { fg: "#c099ff" attr: "b" }
+ shape_range: { fg: "#ffc777" attr: "b" }
+ shape_record: { fg: "#86e1fc" attr: "b" }
+ shape_redirection: { fg: "#c099ff" attr: "b" }
+ shape_signature: { fg: "#c3e88d" attr: "b" }
+ shape_string: "#c3e88d"
+ shape_string_interpolation: { fg: "#86e1fc" attr: "b" }
+ shape_table: { fg: "#82aaff" attr: "b" }
+ shape_variable: "#c099ff"
+
+ background: "#222436"
+ foreground: "#c8d3f5"
+ cursor: "#c8d3f5"
+}}