[Good First Issue]: Normalize line endings in `FeeComponentsUnitTests.cc` to LF

### 🆕🐥 First-Time Friendly

This issue is especially welcoming for people who are new to contributing to the **Hiero C++ SDK**.

We know that opening your first pull request can feel like a big step. Issues labeled **Good First Issue** are designed to make that experience easier, clearer, and more comfortable.

No prior knowledge of Hiero, Hedera, or distributed ledger technology is required - just a basic familiarity with C++ and Git is more than enough to get started.

> [!IMPORTANT]
> ### 📋 About Good First Issues
>
> Good First Issues are designed to make getting started as smooth and stress-free as possible.
>
> They usually focus on:
> - Small, clearly scoped changes
> - Straightforward updates to existing code or docs
> - Simple refactors or clarity improvements
>
> Other kinds of contributions — like larger features, deeper technical changes, or design-focused work — are just as valuable and often use the beginner, intermediate, or advanced labels.

### 👾 Description of the Task

`src/sdk/tests/unit/FeeComponentsUnitTests.cc` was created in PR #1438 with Windows-style **CRLF** line endings. Every other file in the project uses **LF**. The mismatch is harmless to the compiled output but pollutes diffs and can cause spurious "whole-file changed" appearances when contributors with different editor configs touch the file.

> Maintainer comment on PR #1438: *"`FeeComponentsUnitTests.cc` was created with Windows-style CRLF line endings — all other files in the project use LF… Not blocking here, but good to know for future contributions!"*

Relevant files:

```
src/sdk/tests/unit/FeeComponentsUnitTests.cc
```

(Optional, only if you discover the same issue exists elsewhere: any other file flagged by the verification step below.)

### 💡 Proposed Solution

Convert the file's line endings from CRLF to LF in place. The fastest reliable way:

```bash
# from the repo root
dos2unix src/sdk/tests/unit/FeeComponentsUnitTests.cc
```

If `dos2unix` isn't available, the equivalent with `sed`:

```bash
sed -i '' 's/\r$//' src/sdk/tests/unit/FeeComponentsUnitTests.cc # macOS BSD sed
# or
sed -i 's/\r$//' src/sdk/tests/unit/FeeComponentsUnitTests.cc # GNU sed
```

Then verify the file looks identical when opened, run the unit suite to confirm nothing else broke, and commit.

### 👩‍💻 Implementation Steps

- [ ] Confirm the issue is real:
```bash
file src/sdk/tests/unit/FeeComponentsUnitTests.cc
# expected output mentions "CRLF line terminators"
```
- [ ] Convert the file to LF using either `dos2unix` or the `sed` one-liner above.
- [ ] Verify the conversion: `file src/sdk/tests/unit/FeeComponentsUnitTests.cc` should now report "ASCII text" or similar without "CRLF line terminators".
- [ ] (Optional) Sweep the rest of the test directory for stragglers:
```bash
git ls-files 'src/sdk/tests/**' | xargs file | grep CRLF
```
If anything else turns up, normalize it too — note them in the PR description.
- [ ] Build the project: `cmake --build --preset linux-x64-debug -j 6`.
- [ ] Run the unit suite: `ctest -j 6 -C Debug --test-dir build/linux-x64-debug -R FeeComponentsUnitTests`.

### ✅ Acceptance Criteria

- [ ] `src/sdk/tests/unit/FeeComponentsUnitTests.cc` uses LF line endings (verified by `file ...`).
- [ ] If other files were also normalized, they are listed in the PR description.
- [ ] The `FeeComponentsUnitTests` test target still builds and passes.
- [ ] No code changes — line endings only.

---

### 📋 Step-by-Step Contribution Guide

To help keep contributions consistent and easy to review, we recommend following these steps:

- [ ] Comment `/assign` to request the issue
- [ ] Wait for assignment
- [ ] Fork the repository and create a branch
- [ ] Set up the project using the instructions in `README.md`
- [ ] Make the requested changes
- [ ] Sign each commit using `-s -S`
- [ ] Push your branch and open a pull request

Read [Workflow Guide](https://github.com/hiero-ledger/hiero-sdk-cpp/blob/main/docs/training/workflow.md) for step-by-step workflow guidance.
Read [README.md](https://github.com/hiero-ledger/hiero-sdk-cpp/blob/main/README.md) for setup instructions.

❗ Pull requests **cannot be merged** without `S` and `s` signed commits.
See the [Signing Guide](https://github.com/hiero-ledger/hiero-sdk-cpp/blob/main/docs/training/signing.md).

### 🤔 Additional Information

- Originating PR: [#1438](https://github.com/hiero-ledger/hiero-sdk-cpp/pull/1438).
- If you're on Windows and your editor auto-converts line endings on save, configure the editor to write LF for this file or set `core.autocrlf=false` for this clone before committing — otherwise your diff will round-trip back to CRLF.

If you have questions while working on this issue, feel free to ask! [Hiero-SDK-C++ Discord](https://discord.com/channels/905194001349627914/1337424839761465364)

Start with src/sdk/tests/unit/FeeComponentsUnitTests.cc and confirm its CRLF line endings using the file command. Normalize that file to LF, then verify the line endings and build with the linux-x64-debug preset. Done means the FeeComponentsUnitTests target builds and passes with no code changes.

Written by the indexing model from the issue text.