rename: Jarvis -> Jervis target, scheme, and folder throughout

The bundle-ID and display-name renames weren't enough — the actual
Xcode target/product name was still "Jarvis", which drives CFBundleName,
Xcode's Organizer archive list, the .xcodeproj filename, and the scheme
name. Renamed all the way through:

- project.yml: top-level name, target key, PRODUCT_NAME, source/info paths
- Jarvis/ -> Jervis/ (source folder, git-tracked as renames, no content
  diffs on the moved files)
- .gitignore, CI workflows, README, CONTRIBUTING: Jarvis.xcodeproj /
  scheme Jarvis -> Jervis.xcodeproj / scheme Jervis

Verified: xcodebuild -scheme Jervis succeeds, produces Jervis.app,
CFBundleName/CFBundleExecutable/CFBundleDisplayName all read "Jervis".
CFBundleIdentifier intentionally stays com.kisani.jarvis (per prior
decision — bundle ID isn't user-facing anywhere including Organizer).

Swift type names (JarvisApp, JarvisWordmark, etc.) and the Gitea repo
name/URL are unchanged — pure internal source identifiers, not user or
developer-facing product identity.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Jervis/Views/Shared/SignalStripe.swift

@@ -0,0 +1,33 @@
+// SignalStripe.swift
+// Jarvis — the 3pt left-edge stripe whose color is tied to the signal score.
+
+import SwiftUI
+
+struct SignalStripe: View {
+    let score: Int
+    var width: CGFloat = 3
+    /// Read stories drop the colored stripe for a neutral one.
+    var muted: Bool = false
+
+    var body: some View {
+        Rectangle()
+            .fill(muted ? Palette.hairline : Signal.stripeColor(score))
+            .frame(width: width)
+    }
+}
+
+#Preview {
+    HStack(spacing: 24) {
+        ForEach([97, 78, 55, 35, 12, 0], id: \.self) { s in
+            VStack {
+                SignalStripe(score: s)
+                    .frame(height: 60)
+                Text("\(s)")
+                    .font(.system(size: 11, design: .monospaced))
+                    .foregroundStyle(Signal.scoreColor(s))
+            }
+        }
+    }
+    .padding()
+    .background(Palette.background)
+}