MAJOR: Project rename and preparation for v1.0.0

I hope I haven't missed any for the renames!

lua/outline/rename.lua

@@ -0,0 +1,42 @@
+local so = require 'outline'
+
+local M = {}
+
+local function get_rename_params(node, winnr)
+  local bufnr = vim.api.nvim_win_get_buf(winnr)
+  local fn = 'file://' .. vim.api.nvim_buf_get_name(bufnr)
+
+  return {
+    textDocument = { uri = fn },
+    position = { line = node.line, character = node.character },
+    bufnr = bufnr,
+  }
+end
+
+function M.rename()
+  local current_line = vim.api.nvim_win_get_cursor(so.view.winnr)[1]
+  local node = so.state.flattened_outline_items[current_line]
+
+  local params = get_rename_params(node, so.state.code_win)
+
+  local new_name = vim.fn.input({ prompt = 'New Name: ', default = node.name })
+  if not new_name or new_name == '' or new_name == node.name then
+    return
+  end
+
+  params.newName = new_name
+
+  vim.lsp.buf_request(
+    params.bufnr,
+    'textDocument/rename',
+    params,
+    function(_, result, ctx)
+      if result ~= nil then
+        local client = vim.lsp.get_client_by_id(ctx.client_id)
+        vim.lsp.util.apply_workspace_edit(result, client.offset_encoding)
+      end
+    end
+  )
+end
+
+return M