make autofix configurable through in-editor configuration

[Techatrix]

Some editors like VS Code and Sublime Text offer their own setting to configure code actions on save, editor.codeActionsOnSave and lsp_code_actions_on_save respectively. These options should be preferred over enable_autofix if possible. The enable_autofix gets renamed to force_autofix to reflect that it should only be used on editors that don't support code actions on save.
fixes #1093

List of editors that should be checked for the best way to implement autofix (code action on save or force_autofix):

• VS Code ❎ with editor.codeActionsOnSave
• Sublime Text LSP ❎ with lsp_code_actions_on_save
• Zed Editor ❎ with code_actions_on_format (haven't checked whether it actually works)
• ZigBrains ❌ (further research required)
• Helix ❌ (possible with force_autofix but the ux is too bad)
• nvim-lspconfig ❎ with vim.lsp.buf.code_action
• CoC ❎ with CocAction
• YouCompleteMe ❌ (wtf is this LSP client?)
• Emacs eglot ❎ with eglot-code-action
• Emacs lsp-mode ❌ (possible with force_autofix)
• Kate ❌

How To Upgrade

Please checkout the Installation Guide and go to the documentation of your editor. Do not blindly change enable_autofix to force_autofix!