feat: add diagnostic line highlightings

lua/core/highlights.lua

···
     ["github_dark_default"] = function()
         util_hl().set("StatusLineNC", { reverse = true, inherit = "StatusLine" })
         util_hl().set("@markup.raw", { italic = false })
+        util_hl().set("DiagnosticLineError", { bg = util_hl().tint(util_hl().get("DiagnosticVirtualTextError", "fg"), -0.8) })
+        util_hl().set("DiagnosticLineWarn", { bg = util_hl().tint(util_hl().get("DiagnosticVirtualTextWarn", "fg"), -0.8) })
+        util_hl().set("DiagnosticLineInfo", { bg = util_hl().tint(util_hl().get("DiagnosticVirtualTextInfo", "fg"), -0.8) })
+        util_hl().set("DiagnosticLineHint", { bg = util_hl().tint(util_hl().get("DiagnosticVirtualTextHint", "fg"), -0.8) })
         -- util_hl.set("StatusLine", { bold = true })
         -- local sep = util_hl.tint(util_hl.get("WinBar", "fg"), -0.25)
         -- util_hl.set("WinBar", { reverse = true })

lua/core/lsp/init.lua

···
 vim.diagnostic.config({
     underline = true,
-    -- virtual_text
-    -- signs
+    virtual_text = true,
+    signs = {
+        linehl = {
+            [vim.diagnostic.severity.ERROR] = "DiagnosticLineError",
+            [vim.diagnostic.severity.WARN] = "DiagnosticLineWarn",
+            [vim.diagnostic.severity.INFO] = "DiagnosticLineInfo",
+            -- [vim.diagnostic.severity.HINT] = "DiagnosticLineHint",
+        },
+    },
     -- float
     -- update_in_insert
     servirty_sort = true,

lua/utils/highlights.lua

···
 -- dealing with types is way hard then I thought
 
 ---@alias HLAttr {from: string, attr: "fg" | "bg", alter: integer}
+---@alias float number
 
 ---@class HLData
 ---@field fg? string foreground