fix(cli): respect CP_VERBOSE if --verbose argument not given

Author: matejchalk

e2e/cli-e2e/tests/__snapshots__/help.e2e.test.ts.snap

@@ -18,9 +18,9 @@ Commands:
 
 
 Global Options:
-      --verbose         When true creates more verbose output. This is helpful w
-                        hen debugging. You may also set CP_VERBOSE env variable
-                        instead.       [boolean] [default: false]
+      --verbose         Toggles whether to print debug logs. The default value is de
+                        rived from the CP_VERBOSE environment variable (false if not
+                         set).                              [boolean]
       --config          Path to config file. By default it loads code-pushup.con
                         fig.(ts|mjs|js).                 [string]
       --tsconfig        Path to a TypeScript config, to be used when loading con

packages/cli/README.md

@@ -195,11 +195,11 @@ Each example is fully tested to demonstrate best practices for plugin testing as
 
 ### Global Options
 
-| Option           | Type      | Default                                      | Description                                                                                                                |
-| ---------------- | --------- | -------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- |
-| **`--verbose`**  | `boolean` | `false`                                      | When true creates more verbose output. This is helpful when debugging. You may also set `CP_VERBOSE` env variable instead. |
-| **`--config`**   | `string`  | looks for `code-pushup.config.{ts\|mjs\|js}` | Path to config file.                                                                                                       |
-| **`--tsconfig`** | `string`  | n/a                                          | Path to a TypeScript config, used to load config file.                                                                     |
+| Option           | Type      | Default                                               | Description                                            |
+| ---------------- | --------- | ----------------------------------------------------- | ------------------------------------------------------ |
+| **`--verbose`**  | `boolean` | `process.env['CP_VERBOSE']` if set, otherwise `false` | Toggles whether to print debug logs.                   |
+| **`--config`**   | `string`  | looks for `code-pushup.config.{ts\|mjs\|js}`          | Path to config file.                                   |
+| **`--tsconfig`** | `string`  | n/a                                                   | Path to a TypeScript config, used to load config file. |
 
 > [!NOTE]  
 > By default, the CLI loads `code-pushup.config.(ts|mjs|js)` if no config path is provided with `--config`.

packages/cli/src/lib/implementation/global.options.ts

@@ -8,9 +8,8 @@ export function yargsGlobalOptionsDefinition(): Record<
   return {
     verbose: {
       describe:
-        'When true creates more verbose output. This is helpful when debugging. You may also set CP_VERBOSE env variable instead.',
+        'Toggles whether to print debug logs. The default value is derived from the CP_VERBOSE environment variable (false if not set).',
       type: 'boolean',
-      default: false,
     },
     config: {
       describe: