Cleanup examples (#5817)

- Remove outdated examples
- Rename folders for consistency
- Remove lots of unused deps in angular example.
- Rename `name` inside `package.json`'s from `@uppy-example/*` to
`example-*`.

**Before**

```
├── angular-example
├── aws-companion
├── aws-nodejs
├── aws-php
├── bundled
├── cdn-example
├── custom-provider
├── digitalocean-spaces
├── multiple-instances
├── node-xhr
├── php-xhr
├── python-xhr
├── react
├── react-native-expo
├── redux
├── sveltekit
├── transloadit
├── transloadit-markdown-bin
├── uppy-with-companion
├── vue3
└── xhr-bundle
```

**After**

```
examples
├── angular
├── aws-companion
├── aws-nodejs
├── aws-php
├── cdn
├── companion
├── companion-custom-provider
├── companion-digitalocean-spaces
├── react
├── react-native-expo
├── redux
├── sveltekit
├── transloadit
├── vue
├── xhr-bundle
├── xhr-node
├── xhr-php
└── xhr-python
```

examples/angular-example/angular.json

@@ -1,92 +0,0 @@
-{
-  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
-  "version": 1,
-  "newProjectRoot": "projects",
-  "projects": {
-    "angular-example": {
-      "projectType": "application",
-      "schematics": {},
-      "root": "",
-      "sourceRoot": "src",
-      "prefix": "app",
-      "architect": {
-        "build": {
-          "builder": "@angular-devkit/build-angular:browser",
-          "options": {
-            "outputPath": "dist/angular-example",
-            "index": "src/index.html",
-            "main": "src/main.ts",
-            "polyfills": ["zone.js"],
-            "tsConfig": "tsconfig.app.json",
-            "assets": ["src/favicon.ico", "src/assets"],
-            "styles": ["src/styles.css"],
-            "scripts": []
-          },
-          "configurations": {
-            "production": {
-              "budgets": [
-                {
-                  "type": "initial",
-                  "maximumWarning": "500kb",
-                  "maximumError": "1mb"
-                },
-                {
-                  "type": "anyComponentStyle",
-                  "maximumWarning": "2kb",
-                  "maximumError": "4kb"
-                }
-              ],
-              "outputHashing": "all"
-            },
-            "development": {
-              "buildOptimizer": false,
-              "optimization": false,
-              "vendorChunk": true,
-              "extractLicenses": false,
-              "sourceMap": true,
-              "namedChunks": true
-            }
-          },
-          "defaultConfiguration": "production"
-        },
-        "serve": {
-          "builder": "@angular-devkit/build-angular:dev-server",
-          "configurations": {
-            "production": {
-              "buildTarget": "angular-example:build:production"
-            },
-            "development": {
-              "buildTarget": "angular-example:build:development"
-            }
-          },
-          "defaultConfiguration": "development"
-        },
-        "extract-i18n": {
-          "builder": "@angular-devkit/build-angular:extract-i18n",
-          "options": {
-            "buildTarget": "angular-example:build"
-          }
-        },
-        "test": {
-          "builder": "@angular-devkit/build-angular:karma",
-          "options": {
-            "polyfills": ["zone.js", "zone.js/testing"],
-            "tsConfig": "tsconfig.spec.json",
-            "assets": ["src/favicon.ico", "src/assets"],
-            "styles": ["src/styles.css"],
-            "scripts": []
-          }
-        },
-        "lint": {
-          "builder": "@angular-eslint/builder:lint",
-          "options": {
-            "lintFilePatterns": ["src/**/*.ts", "src/**/*.html"]
-          }
-        }
-      }
-    }
-  },
-  "cli": {
-    "schematicCollections": ["@angular-eslint/schematics"]
-  }
-}