feat(plugins): add nvcheatsheet.nvim support

Author: mehalter

README.md

@@ -246,6 +246,7 @@ term.foreground
 | [neo-tree.nvim](https://github.com/nvim-neo-tree/neo-tree.nvim)                 | `neo-tree`           |
 | [neogit](https://github.com/NeogitOrg/neogit)                                   | `neogit`             |
 | [noice.nvim](https://github.com/folke/noice.nvim)                               | `noice`              |
+| [nvcheatsheet.nvim](https://github.com/smartinellimarco/nvcheatsheet.nvim)      | `nvcheatsheet`       |
 | [nvim-cmp](https://github.com/hrsh7th/nvim-cmp)                                 | `nvim-cmp`           |
 | [nvim-dap-ui](https://github.com/rcarriga/nvim-dap-ui)                          | `nvim-dap-ui`        |
 | [nvim-notify](https://github.com/rcarriga/nvim-notify)                          | `nvim-notify`        |

lua/astrotheme/groups/plugins/init.lua

@@ -14,6 +14,7 @@ return {
   ["neo-tree.nvim"] = "neo-tree",
   ["neogit"] = "neogit",
   ["noice.nvim"] = "noice",
+  ["nvcheatsheet.nvim"] = "nvcheatsheet",
   ["nvim-cmp"] = "nvim-cmp",
   ["nvim-dap-ui"] = "nvim-dap-ui",
   ["nvim-notify"] = "nvim-notify",

lua/astrotheme/groups/plugins/nvcheatsheet.lua

@@ -0,0 +1,21 @@
+---@type AstroThemeCallback
+local function callback(opts)
+  return {
+    NvChAsciiHeader = { bg = opts.transparent and C.none or C.ui.base, fg = C.ui.title }, -- Title
+    NvChSection = { bg = C.ui.highlight }, -- Each card
+
+    -- Colors for the headers
+    NvCheatsheetWhite = { bg = C.ui.text_match, fg = C.ui.base },
+    NvCheatsheetGray = { bg = C.ui.text, fg = C.ui.base },
+    NvCheatsheetBlue = { bg = C.ui.blue, fg = C.ui.base },
+    NvCheatsheetCyan = { bg = C.ui.cyan, fg = C.ui.base },
+    NvCheatsheetRed = { bg = C.ui.red, fg = C.ui.base },
+    NvCheatsheetGreen = { bg = C.ui.green, fg = C.ui.base },
+    NvCheatsheetYellow = { bg = C.ui.yellow, fg = C.ui.base },
+    NvCheatsheetOrange = { bg = C.ui.orange, fg = C.ui.base },
+    NvCheatsheetPurple = { bg = C.ui.purple, fg = C.ui.base },
+    NvCheatsheetMagenta = { bg = C.syntax.purple, fg = C.ui.base },
+  }
+end
+
+return callback