Fix keymap and plugin spec bugs

- Move fugitive force-push from <leader>gf to <leader>gF; <leader>gf is
  LazyVim's read-only "Git Current File History"
- octo.nvim used `opt` instead of `opts`, so the PR comment mappings were
  silently dropped; also drop the spec duplicated by the util.octo extra
- oil's `-` keymap had `desc` nested in a third table, so lazy.nvim ignored it

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lua/plugins/octo.lua

@@ -1,15 +1,6 @@
 return {
   "pwntester/octo.nvim",
-  dependencies = {
-    "nvim-lua/plenary.nvim",
-    "nvim-telescope/telescope.nvim",
-    -- OR 'ibhagwan/fzf-lua',
-    "nvim-tree/nvim-web-devicons",
-  },
-  cmd = {
-    "Octo",
-  },
-  opt = {
+  opts = {
     mappings = {
       pull_request = {
         next_comment = { lhs = "<space>]c", desc = "go to next comment" },