fix(ci): add webpack aliases for workspace packages in Cypress config

Fix Cypress component tests failing with "Cannot resolve '@instructure/ui'" errors.

Issue: Cypress webpack running in its own context cannot resolve pnpm workspace
packages even with hoisted node-linker, because packages aren't in node_modules
in the expected locations.

Solution: Dynamically generate webpack aliases that map all @instructure/* packages
to their actual workspace locations in packages/*/. This allows Cypress webpack to
resolve both top-level imports (@instructure/ui) and deep imports
(@instructure/ui-button/src/...).

Implementation:
- Added getWorkspaceAliases() function that scans packages/ directory
- Generates aliases for all workspace packages
- Supports both package root and /src paths

This is the pnpm-compatible approach to module resolution for Cypress component tests.

Fixes: Cypress component tests and visual regression tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: balzss

cypress/webpack.config.cjs

@@ -1,9 +1,37 @@
 const path = require('path')
+const fs = require('fs')
+
+// Generate aliases for all @instructure/* workspace packages
+function getWorkspaceAliases() {
+  const packagesDir = path.resolve(__dirname, '../packages')
+  const packages = fs.readdirSync(packagesDir)
+  const aliases = {}
+
+  packages.forEach(pkg => {
+    const pkgPath = path.join(packagesDir, pkg)
+    if (fs.statSync(pkgPath).isDirectory()) {
+      const pkgJsonPath = path.join(pkgPath, 'package.json')
+      if (fs.existsSync(pkgJsonPath)) {
+        const pkgJson = JSON.parse(fs.readFileSync(pkgJsonPath, 'utf8'))
+        const pkgName = pkgJson.name
+        if (pkgName && pkgName.startsWith('@instructure/')) {
+          // Alias package name to its source directory
+          aliases[pkgName] = pkgPath
+          // Also alias deep imports (e.g., '@instructure/ui-button/src/...')
+          aliases[`${pkgName}/src`] = path.join(pkgPath, 'src')
+        }
+      }
+    }
+  })
+
+  return aliases
+}
 
 module.exports = {
   mode: 'development',
   resolve: {
     extensions: ['.ts', '.tsx', '.js'],
+    alias: getWorkspaceAliases(),
     fallback: {
       fs: false,
       module: false,