[FEAT] Configure if protected branch rule should apply to admins

- Currently protected branch rules do not apply to admins, however in
some cases (like in the case of Forgejo project) you might also want to
apply these rules to admins to avoid accidental merges.
- Add new option to configure this on a per-rule basis.
- Adds integration tests.
- Resolves #65

templates/repo/issue/view_content/pull.tmpl

@@ -158,7 +158,7 @@
 				{{$notAllOverridableChecksOk := or .IsBlockedByApprovals .IsBlockedByRejection .IsBlockedByOfficialReviewRequests .IsBlockedByOutdatedBranch .IsBlockedByChangedProtectedFiles (and .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess))}}
 
 				{{/* admin can merge without checks, writer can merge when checks succeed */}}
-				{{$canMergeNow := and (or $.IsRepoAdmin (not $notAllOverridableChecksOk)) (or (not .AllowMerge) (not .RequireSigned) .WillSign)}}
+				{{$canMergeNow := and (or (and $.IsRepoAdmin (not .ProtectedBranch.ApplyToAdmins)) (not $notAllOverridableChecksOk)) (or (not .AllowMerge) (not .RequireSigned) .WillSign)}}
 				{{/* admin and writer both can make an auto merge schedule */}}
 
 				{{if $canMergeNow}}

templates/repo/settings/protected_branch.tmpl

@@ -260,6 +260,14 @@
 						<p class="help">{{ctx.Locale.Tr "repo.settings.block_outdated_branch_desc"}}</p>
 					</div>
 				</div>
+				<h5 class="ui dividing header">{{ctx.Locale.Tr "repo.settings.event_pull_request_enforcement"}}</h5>
+				<div class="field">
+					<div class="ui checkbox">
+						<input name="apply_to_admins" type="checkbox" {{if .Rule.ApplyToAdmins}}checked{{end}}>
+						<label>{{ctx.Locale.Tr "repo.settings.enforce_on_admins"}}</label>
+						<p class="help">{{ctx.Locale.Tr "repo.settings.enforce_on_admins_desc"}}</p>
+					</div>
+				</div>
 				<div class="divider"></div>
 
 				<div class="field">

templates/swagger/v1_json.tmpl

@@ -17759,6 +17759,10 @@
       "description": "BranchProtection represents a branch protection for a repository",
       "type": "object",
       "properties": {
+        "apply_to_admins": {
+          "type": "boolean",
+          "x-go-name": "ApplyToAdmins"
+        },
         "approvals_whitelist_teams": {
           "type": "array",
           "items": {
@@ -18409,6 +18413,10 @@
       "description": "CreateBranchProtectionOption options for creating a branch protection",
       "type": "object",
       "properties": {
+        "apply_to_admins": {
+          "type": "boolean",
+          "x-go-name": "ApplyToAdmins"
+        },
         "approvals_whitelist_teams": {
           "type": "array",
           "items": {
@@ -19580,6 +19588,10 @@
       "description": "EditBranchProtectionOption options for editing a branch protection",
       "type": "object",
       "properties": {
+        "apply_to_admins": {
+          "type": "boolean",
+          "x-go-name": "ApplyToAdmins"
+        },
         "approvals_whitelist_teams": {
           "type": "array",
           "items": {