feat: add `markdownlint`, `stylelint`, `codespell`, and `biome` (#45)

* feat: add markdownlint, stylelint & codespell

* feat: add `biome`

* fix: indentation

4 files changed, 44 insertions, 0 deletions

diff --git a/lua/conform/formatters/biome.lua b/lua/conform/formatters/biome.lua
new file mode 100644
index 0000000..f6d6ae8
--- /dev/null
+++ b/lua/conform/formatters/biome.lua
@@ -0,0 +1,10 @@
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/biomejs/biome",
+    description = "A toolchain for web projects, aimed to provide functionalities to maintain them.",
+  },
+  command = "biome",
+  stdin = true,
+  args = { "format", "--stdin-file-path", "$FILENAME" },
+}
diff --git a/lua/conform/formatters/codespell.lua b/lua/conform/formatters/codespell.lua
new file mode 100644
index 0000000..ca07415
--- /dev/null
+++ b/lua/conform/formatters/codespell.lua
@@ -0,0 +1,14 @@
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/codespell-project/codespell",
+    description = "Check code for common misspellings.",
+  },
+  command = "codespell",
+  stdin = false,
+  args = {
+    "$FILENAME",
+    "--write-changes",
+    "--check-hidden", -- conform's temp file is hidden
+  },
+}
diff --git a/lua/conform/formatters/markdownlint.lua b/lua/conform/formatters/markdownlint.lua
new file mode 100644
index 0000000..654a603
--- /dev/null
+++ b/lua/conform/formatters/markdownlint.lua
@@ -0,0 +1,10 @@
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/DavidAnson/markdownlint",
+    description = "A Node.js style checker and lint tool for Markdown/CommonMark files.",
+  },
+  command = "markdownlint",
+  args = { "--fix", "$FILENAME" },
+  stdin = false,
+}
diff --git a/lua/conform/formatters/stylelint.lua b/lua/conform/formatters/stylelint.lua
new file mode 100644
index 0000000..3d8361d
--- /dev/null
+++ b/lua/conform/formatters/stylelint.lua
@@ -0,0 +1,10 @@
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/stylelint/stylelint",
+    description = "A mighty CSS linter that helps you avoid errors and enforce conventions.",
+  },
+  command = "stylelint",
+  args = { "--stdin", "--fix" },
+  stdin = true,
+}