Hard to read errors when unable to parse the config

### Description

Now, for example, if we pass an empty string in an environment variable for a key that implies a boolean value and is parsed through JSON.parse, we get an unreadable error: “Uncaught SyntaxError: Unexpected end of JSON input".

Error should be readable and should include "what variable was it, what value was it"

Probably it should be fixed in https://github.com/gemini-testing/configparser

### Verify latest release

- [x] I verified that the issue exists in the latest Testplane release

### Testplane version

_No response_

### Last Testplane version that worked

_No response_

### Which area(s) of Testplane are affected? (leave empty if unsure)

Configuration

### Link to the code that reproduces this issue or a replay of the bug

_No response_

### Reproduction steps

- Attach any of our plugins (for example, html-reporter)
- Overwrite json value with invalid env variable (for example, html_reporter_enabled)
- `html_reporter_enabled=invalid npx testplane`

### Actual Behavior

We get error like:
```
[13:28:23 +0300] Unhandled Rejection in testplane:master:42579:
Promise: Promise {
SyntaxError: Unexpected token i in JSON at position 0
at parse ()
at /Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/core.js:25:21
at /Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/core.js:68:26
at Object.get [as enabled] (/Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/lazy.js:27:25)
at /Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:2730:27
at arrayEach (/Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:530:11)
at baseClone (/Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:2727:7)
at Function.cloneDeep (/Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:11156:14)
at forceParsing (/Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/lazy.js:16:14)
at /Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/core.js:105:16
}
Reason: SyntaxError: Unexpected token i in JSON at position 0
at parse ()
at /Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/core.js:25:21
at /Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/core.js:68:26
at Object.get [as enabled] (/Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/lazy.js:27:25)
at /Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:2730:27
at arrayEach (/Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:530:11)
at baseClone (/Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:2727:7)
at Function.cloneDeep (/Users/kroman512/clean/minimal-testplane/node_modules/lodash/lodash.js:11156:14)
at forceParsing (/Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/lazy.js:16:14)
at /Users/kroman512/clean/minimal-testplane/node_modules/html-reporter/node_modules/gemini-configparser/lib/core.js:105:16
```

### Expected Behavior

human-readable error, from which it would be clear that "html_reporter_enabled" env variable value is the issue

### Which Node.js version are you using?

20.11.0

_Internal issue: https://nda.ya.ru/t/4PWRys2Q7JhGvW_