✨ Add render-markdown integration support

Add render-markdown.nvim integration with comprehensive theming

- Add render-markdown.lua integration module with 52 highlight groups
- Configure heading colors using theme palette (H1-H6 with distinct colors)
- Add code block and inline code highlighting with background colors
- Style list bullets, checkboxes, and quote blocks with theme colors
- Configure table styling with purple accents and proper row formatting
- Add link styling with cyan color and underline decoration
- Include callout styling for info, success, hint, warn, and error states
- Register render-markdown in plugin detection mapping
- Add to available integrations list for auto-detection

Provides complete markdown rendering support with SilkCircuit color
scheme integration for enhanced document readability.

Author: hyperb1iss

lua/silkcircuit/integrations/init.lua

@@ -143,6 +143,11 @@ local plugin_mapping = {
   snacks = function()
     return pcall(require, "snacks")
   end,
+
+  -- render-markdown.nvim
+  ["render-markdown"] = function()
+    return pcall(require, "render-markdown")
+  end,
 }
 
 -- Check if a plugin is installed
@@ -180,6 +185,7 @@ local all_integrations = {
   "outline",
   "rainbow_delimiters",
   "snacks",
+  "render-markdown",
   "telescope",
   "treesitter",
   "trouble",

lua/silkcircuit/integrations/render-markdown.lua

@@ -0,0 +1,52 @@
+local M = {}
+
+function M.get(colors)
+  return {
+    -- Headings
+    RenderMarkdownH1 = { fg = colors.pink, bold = true },
+    RenderMarkdownH1Bg = { bg = colors.bg_highlight },
+    RenderMarkdownH2 = { fg = colors.purple, bold = true },
+    RenderMarkdownH2Bg = { bg = colors.bg_dark },
+    RenderMarkdownH3 = { fg = colors.cyan, bold = true },
+    RenderMarkdownH3Bg = { bg = colors.bg_dark },
+    RenderMarkdownH4 = { fg = colors.yellow, bold = true },
+    RenderMarkdownH4Bg = { bg = colors.bg_dark },
+    RenderMarkdownH5 = { fg = colors.green, bold = true },
+    RenderMarkdownH5Bg = { bg = colors.bg_dark },
+    RenderMarkdownH6 = { fg = colors.blue, bold = true },
+    RenderMarkdownH6Bg = { bg = colors.bg_dark },
+
+    -- Code
+    RenderMarkdownCode = { bg = colors.bg_dark },
+    RenderMarkdownCodeInline = { fg = colors.cyan, bg = colors.bg_highlight },
+
+    -- Lists
+    RenderMarkdownBullet = { fg = colors.purple },
+    RenderMarkdownDash = { fg = colors.purple_muted },
+
+    -- Checkboxes
+    RenderMarkdownUnchecked = { fg = colors.red },
+    RenderMarkdownChecked = { fg = colors.green },
+    RenderMarkdownTodo = { fg = colors.yellow },
+
+    -- Quotes
+    RenderMarkdownQuote = { fg = colors.purple_muted, italic = true },
+
+    -- Tables
+    RenderMarkdownTableHead = { fg = colors.purple, bold = true },
+    RenderMarkdownTableRow = { fg = colors.fg },
+    RenderMarkdownTableFill = { fg = colors.purple_muted },
+
+    -- Links
+    RenderMarkdownLink = { fg = colors.cyan, underline = true },
+
+    -- Callouts
+    RenderMarkdownInfo = { fg = colors.cyan },
+    RenderMarkdownSuccess = { fg = colors.green },
+    RenderMarkdownHint = { fg = colors.yellow },
+    RenderMarkdownWarn = { fg = colors.yellow },
+    RenderMarkdownError = { fg = colors.red },
+  }
+end
+
+return M