WIP: Add Diff Patch support

[zeripath]

This code adds a simple endpoint to add diff patch application to Gitea

• Initial implementation of ApplyDiffPatch - can be tested at /owner/repo/_diffpatch/branch or on API
• Wire in to UI
• Better error support

[6543]

step towards #9388

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@2447ffc). Click here to learn what that means.
The diff coverage is 1.21%.

@@            Coverage Diff            @@
##             master   #10007   +/-   ##
=========================================
  Coverage          ?   43.59%           
=========================================
  Files             ?      588           
  Lines             ?    81257           
  Branches          ?        0           
=========================================
  Hits              ?    35420           
  Misses            ?    41454           
  Partials          ?     4383           

Impacted Files	Coverage Δ
modules/repofiles/patch.go	0.00% <0.00%> (ø)
routers/api/v1/repo/patch.go	0.00% <0.00%> (ø)
routers/repo/patch.go	0.00% <0.00%> (ø)
routers/api/v1/api.go	75.39% <100.00%> (ø)
routers/routes/routes.go	86.60% <100.00%> (ø)
models/migrations/v105.go	0.00% <0.00%> (ø)
modules/queue/queue.go	24.44% <0.00%> (ø)
modules/process/manager.go	74.69% <0.00%> (ø)
modules/git/repo_hook.go	100.00% <0.00%> (ø)
models/helper_directory.go	40.90% <0.00%> (ø)
... and 583 more

---

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[6543]

add _diffpatch to the list of forbidden branchnames

[zeripath]

@6543 I'm not sure banning _diffpatch is needed?

[lafriks]

I also think it would not conflict with branch names

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 2 months. Thank you for your contributions.

[6543]

ping

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 2 months. Thank you for your contributions.

[binyamin]

@6543 My understanding is that #13442 (send patches via email) depends on this pull request. I'm looking forward to that feature. How can I help get this merged?

[zeripath]

it's essentially ready depending on the UI but I was trying to get ```suggestion support sorted however I've been exceptionally busy fixing multiple bugs - (77 PRs to 1.14 fixing bugs)

[6543]

-> #17902