refactor: apply minimal tfcode branding

- Rename packages/opencode → packages/tfcode (directory only)
- Rename bin/opencode → bin/tfcode (CLI binary)
- Rename .opencode → .tfcode (config directory)
- Update package.json name and bin field
- Update config directory path references (.tfcode)
- Keep internal code references as 'opencode' for easy upstream sync
- Keep @opencode-ai/* workspace package names

This minimal branding approach allows clean merges from upstream
opencode repository while providing tfcode branding for users.

packages/tfcode/test/cli/account.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, test } from "bun:test"
+import stripAnsi from "strip-ansi"
+
+import { formatAccountLabel, formatOrgLine } from "../../src/cli/cmd/account"
+
+describe("console account display", () => {
+  test("includes the account url in account labels", () => {
+    expect(stripAnsi(formatAccountLabel({ email: "one@example.com", url: "https://one.example.com" }, false))).toBe(
+      "one@example.com https://one.example.com",
+    )
+  })
+
+  test("includes the active marker in account labels", () => {
+    expect(stripAnsi(formatAccountLabel({ email: "one@example.com", url: "https://one.example.com" }, true))).toBe(
+      "one@example.com https://one.example.com (active)",
+    )
+  })
+
+  test("includes the account url in org rows", () => {
+    expect(
+      stripAnsi(
+        formatOrgLine({ email: "one@example.com", url: "https://one.example.com" }, { id: "org-1", name: "One" }, true),
+      ),
+    ).toBe("  ● One  one@example.com  https://one.example.com  org-1")
+  })
+})