feat: disable rendering in diff mode

## Details

Issue: #169

Was cut as a question however there was no way to accomplish this before.

The behavior is made global with no way to disable it for now. I can add
one if requested however I don't see that happening as if you are
looking at a diff you probably want to see the underlying text and not a
rendered approximation.

Change is rather small, only adding a check on the `diff` window option
when deciding what the next state of the buffer should be.

We also need to listen to the `DiffUpdated` event so that rendering is
correctly disabled when switching between a diff mode view of the buffer
and a standard view.

Author: MeanderingProgrammer

Diff for: CHANGELOG.md

@@ -8,6 +8,7 @@
   [2424693](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/2424693c7a4c79641a7ea1e2a838dbc9238d6066)
 - table min width [f84eeae](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/f84eeaebac278e26bd2906fd47747631716a5edb)
 - new debug API for development [6f87257](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/6f8725746ecadae0ae5ab3e7a1a445dad6b2e231)
+- `render_modes` as a boolean [7493db6](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/7493db6d3fe3f6679549e6020498f72e97cd9b73)
 
 ### Bug Fixes
 

Diff for: lua/render-markdown/core/ui.lua

@@ -118,6 +118,9 @@ function M.next_state(config, win)
     if not state.enabled then
         return 'default'
     end
+    if util.get_win(win, 'diff') then
+        return 'default'
+    end
     if not util.view(win).leftcol == 0 then
         return 'default'
     end

Diff for: lua/render-markdown/health.lua

@@ -4,7 +4,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '7.0.7'
+M.version = '7.0.8'
 
 function M.check()
     M.start('version')

Diff for: lua/render-markdown/manager.lua

@@ -58,7 +58,7 @@ function M.attach(buf)
     end
     local config = state.get_config(buf)
     local events = { 'BufWinEnter', 'BufLeave', 'CursorHold', 'CursorMoved' }
-    local change_events = { 'ModeChanged', 'TextChanged' }
+    local change_events = { 'DiffUpdated', 'ModeChanged', 'TextChanged' }
     if config:render('i') then
         vim.list_extend(events, { 'CursorHoldI', 'CursorMovedI' })
         vim.list_extend(change_events, { 'TextChangedI' })