fix: a lot of small things and adds more customization for caret (#554)

Attention:
prompt_prefix will no longer add a space at the end. So if you still want a space at the end make sure your configuration has one.
The default should not be changed. So if you haven't copied prompt_prefix in your config this doesn't affect you.

Feat:
- prompt prefix does no longer always end with space
- selection_caret configurable. Default: `> `
- result_prefix configurable. Default: `  `
- more actions for git_branches
  - <c-t> does track the branch
  - <c-r> does rebase branch
  - also added delete branch action but not configured. See readme on how to do that

Fixes:
- fix docgen ci
- Better error for lsp_workspace_symbols
- better formatting for CONTRIBUTING.md
- move from systemlist to plenary.job
- git branch now supports checkout on remote branches

lua/telescope/init.lua

@@ -14,12 +14,11 @@ local telescope = {}
 ---
 --- To find out more:
 --- https://github.com/nvim-telescope/telescope.nvim
---
---   :h telescope.setup
---   :h telescope.builtin
---   :h telescope.layout
---   :h telescope.actions
---
+---
+---   :h telescope.setup
+---   :h telescope.builtin
+---   :h telescope.layout
+---   :h telescope.actions
 ---@brief ]]
 
 ---@tag telescope.nvim