feat: scaffold CLI and minimal issue list (task 0001)

Tracer bullet for gitea-axi: runnable npm package on axi-sdk-js with
gitea-js as the sole HTTP layer, ESM on Node 20+.

- issue list with --state/--limit, default fields, count line from
  X-Total-Count, type=issues guard, explicit empty state, and next-step
  suggestions
- repo context detection from the git origin remote (SSH/scp/HTTPS),
  tea credential discovery with the three-way login-matching split, and
  -R/--repo and --login overrides (flag > env > auto)
- token retrieval via tea login helper get: tea's login list JSON
  carries no token (ADR 0001 amended)
- full AxiError classification table with path-based 404 split, TOON
  errors on stdout, exit codes 0/1/2
- test mode (GITEA_AXI_API_URL/TOKEN/REPO) suppressing subprocesses,
  fixture server, and vitest suites driving the CLI seam (50 tests)

src/render.ts

@@ -0,0 +1,44 @@
+import { encode } from "@toon-format/toon";
+
+// Same shape the SDK's own error formatter produces; its renderError helper
+// exists in axi-sdk-js but is not exported from the package index.
+export function renderErrorOutput(
+  message: string,
+  code: string,
+  suggestions: string[] = [],
+): string {
+  const output: Record<string, unknown> = { error: message, code };
+  if (suggestions.length > 0) {
+    output.help = suggestions;
+  }
+  return encode(output);
+}
+
+export function formatCountLine(
+  shown: number,
+  total: number | undefined,
+  atLimit: boolean,
+): string {
+  if (total === undefined) {
+    if (atLimit) {
+      return `count: ${shown} (showing first ${shown})`;
+    }
+    return `count: ${shown} of ${shown} total`;
+  }
+  return `count: ${shown} of ${total} total`;
+}
+
+export interface RenderListOptions {
+  noun: string;
+  rows: Record<string, unknown>[];
+  countLine: string;
+  help: string[];
+}
+
+export function renderList(options: RenderListOptions): string {
+  const body =
+    options.rows.length > 0
+      ? encode({ [options.noun]: options.rows })
+      : `${options.noun}[0]: (none)`;
+  return [options.countLine, body, encode({ help: options.help })].join("\n");
+}