Move lsp config to local file structure

.config/nvim/lsp/pylyzer.lua

@@ -0,0 +1,35 @@
+---@brief
+---
+--- https://github.com/mtshiba/pylyzer
+---
+--- `pylyzer`, a fast static code analyzer & language server for Python.
+---
+--- `pylyzer` requires Erg as dependency, and finds it via `ERG_PATH` environment variable.
+--- This config sets `ERG_PATH="~/.erg"`. Set `cmd_env` if you want to change it.
+--- To install Erg, simply extract tarball/zip from [Erg releases](https://github.com/erg-lang/erg/releases/latest)
+--- to the the path where you want to install it, e.g. `~/.erg`.
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'pylyzer', '--server' },
+  filetypes = { 'python' },
+  root_markers = {
+    'setup.py',
+    'tox.ini',
+    'requirements.txt',
+    'Pipfile',
+    'pyproject.toml',
+    '.git',
+  },
+  settings = {
+    python = {
+      diagnostics = true,
+      inlayHints = true,
+      smartCompletion = true,
+      checkOnType = false,
+    },
+  },
+  cmd_env = {
+    ERG_PATH = vim.env.ERG_PATH or vim.fs.joinpath(vim.uv.os_homedir(), '.erg'),
+  },
+}