fix(docs): docgen.lua reads from lua/*.lua

Problem:
Since configs now live in `lsp/`, the docgen needs to be updated.

Solution:
Read the configs from `lsp/`. Parse the `@brief` docstring to get the
docs.

Author: justinmk

doc/configs.md

@@ -2,7 +2,7 @@ local util = require 'lspconfig.util'
 
 ---@brief
 ---
----https://github.com/AdaCore/ada_language_server
+-- https://github.com/AdaCore/ada_language_server
 --
 -- Installation instructions can be found [here](https://github.com/AdaCore/ada_language_server#Install).
 --

doc/configs.txt

@@ -2,7 +2,7 @@ local util = require 'lspconfig.util'
 
 ---@brief
 ---
----https://github.com/agda/agda-language-server
+-- https://github.com/agda/agda-language-server
 --
 -- Language Server for Agda.
 return {

lsp/ada_ls.lua

@@ -1,6 +1,6 @@
 ---@brief
 ---
----https://github.com/aiken-lang/aiken
+-- https://github.com/aiken-lang/aiken
 --
 -- A language server for Aiken Programming Language.
 -- [Installation](https://aiken-lang.org/installation-instructions)

lsp/agda_ls.lua

@@ -1,6 +1,6 @@
 ---@brief
 ---
----https://github.com/posit-dev/air
+-- https://github.com/posit-dev/air
 --
 -- Air is an R formatter and language server, written in Rust.
 --

lsp/aiken.lua

@@ -1,6 +1,6 @@
 ---@brief
 ---
----https://github.com/AlloyTools/org.alloytools.alloy
+-- https://github.com/AlloyTools/org.alloytools.alloy
 --
 -- Alloy is a formal specification language for describing structures and a tool for exploring them.
 --

lsp/air.lua

@@ -1,6 +1,6 @@
 ---@brief
 ---
----https://pypi.org/project/anakin-language-server/
+-- https://pypi.org/project/anakin-language-server/
 --
 -- `anakin-language-server` is yet another Jedi Python language server.
 --

lsp/alloy_ls.lua

@@ -1,6 +1,6 @@
 ---@brief
 ---
----https://github.com/ansible/vscode-ansible
+-- https://github.com/ansible/vscode-ansible
 --
 -- Language server for the ansible configuration management tool.
 --

lsp/anakin_language_server.lua

@@ -1,6 +1,6 @@
 ---@brief
 ---
----https://www.npmjs.com/package/antlers-language-server
+-- https://www.npmjs.com/package/antlers-language-server
 --
 -- `antlersls` can be installed via `npm`:
 -- ```sh