Show full error context in server messages (#13029)
## Summary
Reference:
https://docs.rs/anyhow/latest/anyhow/struct.Error.html#display-representations
Closes: #13022
## Test Plan
```
2024-08-21 15:21:24.831 [info] [Trace - 3:21:24 PM] 0.017255167s ERROR ThreadId(04) ruff_server::session::index::ruff_settings: Failed to parse /Users/dhruv/playground/ruff/pyproject.toml: TOML parse error at line 1, column 1
|
1 | [tool.ruff.lint]
| ^^^^^^^^^^^^^^^^
Unknown rule selector: `ME102`
```
Or,
```
2024-08-21 15:23:47.993 [info] [Trace - 3:23:47 PM] 143.179857375s ERROR ThreadId(66) ruff_server::session::index::ruff_settings: Failed to parse /Users/dhruv/playground/ruff/pyproject.toml: TOML parse error at line 2, column 42
|
2 | select = ["ALL", "TD006", "TD007", "FIX"
| ^
invalid array
expected `]`
```
