feat(github): pull request tool window, timeline and review flow (#477)

Replaces the Pull Requests tool window with a full review workflow on top of gh's authentication.

- List with search, quick filters and paging; a tab per pull request and a New Pull Request tab.
- Details: commit picker, changes tree with viewed state, CI and reviewer status, merge, close and reopen.
- Timeline editor: comments, review threads, reactions and suggested changes.
- Review in the diff viewer and, for the checked-out branch, in the editor (review mode).
- New generic vcs extension points: registerDiffViewerProvider, lineInlays, reviewGutter, branch widget extensions; new vcs_merge_base and gh_api commands.
- CSP: img-src allows https://avatars.githubusercontent.com for avatars.

Fixed while testing against a real repository: remotes behind an SSH host alias, mergeability stuck on UNKNOWN, Apply Locally staying disabled after a checkout, relative links navigating the app's page, and review inlays wider than the pane.

Co-authored-by: imacross <[email protected]>

src/platform/keymaps/eclipse.test.ts

@@ -56,8 +56,20 @@ const shared = [
   ["refactor.move", "project.move"],
   ["editor.closeTab", "toolwindow.closeContent"],
   ["run.rerun", "debug.rerun", "find.rerun", "usages.rerun"],
-  ["debug.smartStepInto", "db.refresh"],
-  ["debug.runToCursor", "db.refresh"],
+  [
+    "debug.smartStepInto",
+    "db.refresh",
+    "github.refresh",
+    "github.pullRequest.refresh",
+    "github.pullRequest.timeline.refresh",
+  ],
+  [
+    "debug.runToCursor",
+    "db.refresh",
+    "github.refresh",
+    "github.pullRequest.refresh",
+    "github.pullRequest.timeline.refresh",
+  ],
   ["editor.increaseFontSize", "image.zoomIn"],
   ["editor.decreaseFontSize", "image.zoomOut"],
 ];

src/platform/keymaps/intellij-macos.ts

@@ -357,6 +357,12 @@ export const intellijMacos: Record<string, string[]> = {
   "db.newDataSource": [],
   "db.new": ["Meta+N"],
   "services.addService": ["Meta+N"],
+  // Pull Requests tool window (Create in its title bar, Refresh per tab) and the review's viewed toggle.
+  "github.createPullRequest": ["Meta+N"],
+  "github.refresh": ["Meta+R"],
+  "github.pullRequest.refresh": ["Meta+R"],
+  "github.pullRequest.timeline.refresh": ["Meta+R"],
+  "github.pullRequest.toggleViewed": ["Meta+Shift+S"],
   "db.properties": ["Shift+Enter"],
   "db.refresh": ["Meta+R"],
   "db.disconnect": ["Meta+F2"],

src/platform/keymaps/intellij-windows.ts

@@ -355,6 +355,12 @@ export const intellijWindows: Record<string, string[]> = {
   "db.newDataSource": [],
   "db.new": ["Alt+Insert"],
   "services.addService": ["Alt+Insert"],
+  // Pull Requests tool window (Create in its title bar, Refresh per tab) and the review's viewed toggle.
+  "github.createPullRequest": ["Alt+Insert"],
+  "github.refresh": ["Ctrl+F5"],
+  "github.pullRequest.refresh": ["Ctrl+F5"],
+  "github.pullRequest.timeline.refresh": ["Ctrl+F5"],
+  "github.pullRequest.toggleViewed": ["Ctrl+Shift+S"],
   "db.properties": ["Shift+Enter"],
   "db.refresh": ["Ctrl+F5"],
   "db.disconnect": ["Ctrl+F2"],

src/platform/keymaps/vscode-macos.ts

@@ -347,6 +347,11 @@ export const vscodeMacos: Record<string, string[]> = {
   "db.newDataSource": [],
   "db.new": [],
   "services.addService": [],
+  "github.createPullRequest": [],
+  "github.refresh": [],
+  "github.pullRequest.refresh": [],
+  "github.pullRequest.timeline.refresh": [],
+  "github.pullRequest.toggleViewed": [],
   "db.properties": [],
   "db.refresh": [],
   "db.disconnect": [],