refactor(init): use shared YES_FLAG and add -y alias constant (#681)

## Summary

Applies the same sharing pattern we use for
`DRY_RUN_FLAG`/`DRY_RUN_ALIASES` to `YES_FLAG`. Adds a `YES_ALIASES`
constant so non-delete commands can reuse `--yes`/`-y` without inlining.
Init overrides the brief to keep its "Non-interactive mode (accept
defaults)" wording.

Follows #676.

## Changes

- Add `YES_ALIASES` export to `mutate-command.ts` (mirrors
`DRY_RUN_ALIASES`)
- Replace init's inline `--yes` definition with `{ ...YES_FLAG, brief:
"..." }`

## Test Plan

- `npx tsc --noEmit` passes
- `sentry-cli init --help` still shows "Non-interactive mode (accept
defaults)" for `--yes`

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: betegon

src/commands/init.ts

@@ -27,7 +27,12 @@ import { warmOrgDetection } from "../lib/init/prefetch.js";
 import { runWizard } from "../lib/init/wizard-runner.js";
 import { validateResourceId } from "../lib/input-validation.js";
 import { logger } from "../lib/logger.js";
-import { DRY_RUN_ALIASES, DRY_RUN_FLAG } from "../lib/mutate-command.js";
+import {
+  DRY_RUN_ALIASES,
+  DRY_RUN_FLAG,
+  YES_ALIASES,
+  YES_FLAG,
+} from "../lib/mutate-command.js";
 
 const log = logger.withTag("init");
 
@@ -205,11 +210,7 @@ export const initCommand = buildCommand<
       ],
     },
     flags: {
-      yes: {
-        kind: "boolean",
-        brief: "Non-interactive mode (accept defaults)",
-        default: false,
-      },
+      yes: { ...YES_FLAG, brief: "Non-interactive mode (accept defaults)" },
       "dry-run": DRY_RUN_FLAG,
       features: {
         kind: "parsed",
@@ -228,7 +229,7 @@ export const initCommand = buildCommand<
     },
     aliases: {
       ...DRY_RUN_ALIASES,
-      y: "yes",
+      ...YES_ALIASES,
       t: "team",
     },
   },

src/lib/mutate-command.ts

@@ -116,6 +116,16 @@ export const DESTRUCTIVE_ALIASES = {
  */
 export const DRY_RUN_ALIASES = { n: "dry-run" } as const;
 
+/**
+ * Alias map for `--yes` only: `-y` → `--yes`.
+ *
+ * Used by non-delete commands that need only the yes flag (not force):
+ * ```ts
+ * aliases: { ...YES_ALIASES, t: "team" }
+ * ```
+ */
+export const YES_ALIASES = { y: "yes" } as const;
+
 // ---------------------------------------------------------------------------
 // Level B: shared utilities
 // ---------------------------------------------------------------------------