CLI does not work with workspaces and yarn pnp or pnpm without hoisting

The way plugins and presets are loaded works with npm's hoisting, and even works in a non-monorepo (or where size-limit and its plugins are installed in the monorepo root), but does not work when size-limit is installed in a workspace with yarn pnp or pnpm with hoisting disabled.

## Reproduction

With yarn:

1. Create a temporary directory and cd into it.
2. Create the following files:
package.json

```json
{
"private": true,
"workspaces": [
"a"
]
}
```

a/index.js

Contents don't matter, even an empty file is ok.

a/package.json

```json
{
"name": "a",
"devDependencies": {
"@size-limit/file": "^11.1.4",
"size-limit": "^11.1.4"
},
"size-limit": [
{
"path": "index.js"
}
],
"scripts": {
"size": "size-limit"
}
}
```

3. Run `yarn set version stable && yarn install`
4. Run `yarn workspace a size`

With pnpm:

1. Create a temporary directory and cd into it.
2. Create the following files:
package.json

```json
{
}
```

.npmrc

```
hoist-pattern=[]
```

pnpm-workspace.yaml

```yaml
packages:
- 'a'
```

a/index.js

Contents don't matter, even an empty file is ok.

a/package.json

```json
{
"name": "a",
"devDependencies": {
"@size-limit/file": "^11.1.4",
"size-limit": "^11.1.4"
},
"size-limit": [
{
"path": "index.js"
}
],
"scripts": {
"size": "size-limit"
}
}
```

3. Run `pnpm install`.
4. Run `pnpm run --dir a size`

## Expected behavior

`size-limit` runs successfully.

## Actual behavior

With yarn:
```
ERROR Error: size-limit tried to access @size-limit/file, but it isn't declared in its dependencies; this makes the require call ambiguous and unsound.

Required package: @size-limit/file (via "@size-limit/file/package.json")
Required by: size-limit@npm:11.1.4 (via /home/user/.yarn/berry/cache/size-limit-npm-11.1.4-dc2e299ec0-10c0.zip/node_modules/size-limit/load-plugins.js)

at makeError (/tmp/test/.pnp.cjs:6744:34)
at resolveToUnqualified (/tmp/test/.pnp.cjs:8392:21)
at Object.resolveToUnqualified (/tmp/test/.pnp.cjs:8572:26)
at resolve$1 (file:///tmp/test/.pnp.loader.mjs:2033:31)
at nextResolve (node:internal/modules/esm/hooks:866:28)
at Hooks.resolve (node:internal/modules/esm/hooks:304:30)
at MessagePort.handleMessage (node:internal/modules/esm/worker:196:24)
at [nodejs.internal.kHybridDispatch] (node:internal/event_target:825:20)
at MessagePort. (node:internal/per_context/messageport:23:28)
```

With pnpm:
```
$ pnpm run --dir a size

> a@ size /tmp/test/a
> size-limit

ERROR Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@size-limit/file' imported from /tmp/test/node_modules/.pnpm/size-limit@11.1.4/node_modules/size-limit/load-plugins.js
at packageResolve (node:internal/modules/esm/resolve:854:9)
at moduleResolve (node:internal/modules/esm/resolve:927:18)
at defaultResolve (node:internal/modules/esm/resolve:1157:11)
at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:383:12)
at ModuleLoader.resolve (node:internal/modules/esm/loader:352:25)
at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:227:38)
at ModuleLoader.import (node:internal/modules/esm/loader:315:34)
at importModuleDynamically (node:internal/modules/esm/translators:161:31)
at importModuleDynamicallyCallback (node:internal/modules/esm/utils:222:14)
at file:///tmp/test/node_modules/.pnpm/size-limit@11.1.4/node_modules/size-limit/load-plugins.js:26:27
 ELIFECYCLE  Command failed with exit code 1.
```