Update ex_doc, add llms.txt support (#122)

* Update ex_doc, add llms.txt support, update description

* Set ex_doc dependency to >= 0.40.0

* Rename prepend_llms_links to append_llms_links

Author: FelonEkonom

README.md

@@ -18,7 +18,7 @@ Note: `Membrane.H264.FFmpeg.Parser` has been removed. Now you can use our pure E
 Add the following line to your `deps` in `mix.exs`. Run `mix deps.get`.
 
 ```elixir
-{:membrane_h264_ffmpeg_plugin, "~> 0.32.6"}
+{:membrane_h264_ffmpeg_plugin, "~> 0.32.7"}
 ```
 
 This package depends on the [ffmpeg](https://www.ffmpeg.org) libraries. The precompiled builds will be pulled and linked automatically. However, should there be any problems, consider installing it manually.

mix.exs

@@ -1,7 +1,7 @@
 defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
   use Mix.Project
 
-  @version "0.32.6"
+  @version "0.32.7"
   @github_url "https://github.com/membraneframework/membrane_h264_ffmpeg_plugin"
 
   def project do
@@ -23,7 +23,8 @@ defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
       name: "Membrane H264 FFmpeg plugin",
       source_url: @github_url,
       homepage_url: "https://membraneframework.org",
-      docs: docs()
+      docs: docs(),
+      aliases: [docs: ["docs", &append_llms_links/1]]
     ]
   end
 
@@ -46,7 +47,7 @@ defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
       {:membrane_common_c, "~> 0.16.0"},
       {:membrane_h264_format, "~> 0.6.1"},
       {:membrane_raw_video_format, "~> 0.4.1"},
-      {:ex_doc, ">= 0.0.0", only: :dev, runtime: false},
+      {:ex_doc, ">= 0.40.0", only: :dev, runtime: false},
       {:credo, ">= 0.0.0", only: :dev, runtime: false},
       {:dialyxir, ">= 0.0.0", only: :dev, runtime: false},
       {:membrane_raw_video_parser_plugin, "~> 0.12.2", only: :test},
@@ -73,7 +74,6 @@ defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
     [
       main: "readme",
       extras: ["README.md"],
-      formatters: ["html"],
       source_ref: "v#{@version}",
       nest_modules_by_prefix: [
         Membrane.H264.FFmpeg
@@ -93,4 +93,26 @@ defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
       exclude_patterns: [~r"c_src/.*/_generated.*"]
     ]
   end
+
+  defp append_llms_links(_args) do
+    output_dir = docs()[:output] || "doc"
+    path = Path.join(output_dir, "llms.txt")
+
+    if File.exists?(path) do
+      existing = File.read!(path)
+
+      footer = """
+
+
+      ## See Also
+
+      - [Membrane Framework AI Skill](https://hexdocs.pm/membrane_core/skill.md)
+      - [Membrane Core](https://hexdocs.pm/membrane_core/llms.txt)
+      """
+
+      File.write!(path, String.trim_trailing(existing) <> footer)
+    else
+      IO.warn("#{path} not found — llms.txt was not generated, check your ex_doc configuration")
+    end
+  end
 end