chore: upgrade eslint plugins, remove eslint-plugin-github (#38046)

- Bump `eslint`, `typescript-eslint` and `eslint-plugin-unicorn` (to
v68), and configure the rules added in unicorn v66/v67/v68.
- Remove `eslint-plugin-github` and its workarounds (rules, type stub,
pnpm peer override, in-code `eslint-disable` comments); the rules worth
keeping are covered by `unicorn` equivalents.
- Apply the resulting fixes and autofixes across the JS codebase.

_Prepared with Claude (Opus 4.8)._

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

vite.config.ts

@@ -56,7 +56,7 @@ const commonRolldownOptions: Rolldown.RolldownOptions = {
   checks: {
     pluginTimings: false,
   },
-  ...(env.CI ? {plugins: [failOnWarningsPlugin()]} : {}),
+  ...(env.CI && {plugins: [failOnWarningsPlugin()]}),
 };
 
 function commonViteOpts({build, ...other}: InlineConfig): InlineConfig {