Launcher: add Epic Games Store platform

[Kheartz]

Resolve the game through the Epic launcher's plaintext manifests: new External::Epic component, ProjectPlatform::EPIC, and RunInnerEpicChecks mirroring the Steam path.

Summary by CodeRabbit

• New Features

  • Added Epic Games Launcher support for launching games.
  • Detects installed Epic games from local manifests and uses the discovered installation path.
  • Added an optional Epic app name setting to improve matching accuracy.
  • Supports matching games by executable filename or Epic app name.

• Bug Fixes

  • Shows a clear error when a matching Epic installation cannot be found.
  • Ignores missing, unreadable, or malformed manifest entries during discovery.

[coderabbitai]

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 187000bf-8964-408c-b91d-c18a40100b34

📥 Commits

Reviewing files that changed from the base of the PR and between e93686b and 9e093ef.

📒 Files selected for processing (1)

• code/framework/src/utils/string_utils.h

Walkthrough

Adds Epic Games Launcher manifest discovery and launcher wiring for the EPIC platform path. The change enumerates manifests, finds installed applications, and resolves the install path before launch.

Changes

Epic Launcher Integration

Layer / File(s)	Summary
Epic manifest data contract and header code/framework/src/external/epic/manifest.h	Defines InstalledApp with validation and declares Epic manifest directory, enumeration, and lookup APIs.
Epic manifest discovery implementation code/framework/src/external/epic/manifest.cpp, code/framework/src/utils/string_utils.h, code/framework/CMakeLists.txt	Resolves the manifest directory, scans .item files, parses JSON, matches applications, adds string utilities, and includes the source in FrameworkLoader.
Launcher EPIC platform wiring and pre-launch checks code/framework/src/launcher/project.h, code/framework/src/launcher/project.cpp	Adds EPIC and epicAppName, then validates the Epic installation and stores the normalized install path before launch.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Suggested reviewers: segfaultd

Poem

A rabbit scans each Epic file,
Finds the matching game in style.
The path is checked before the run,
Then off it hops beneath the sun. 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding Epic Games Store support to the launcher.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[Kheartz]

Woops sorry, didnt mean to close--was cleaning out my branches.

[coderabbitai]

🧹 Nitpick comments (1)

code/framework/src/utils/string_utils.h (1)

46-58: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Remove the duplicate helper implementations.

The supplied repository context shows identical ToLower and FileName implementations in code/framework/src/launcher/project.cpp Lines 47-58, code/framework/src/launcher/project.h Lines 47-58, and code/framework/src/external/epic/manifest.h Lines 47-58. Replace those copies with Framework::Utils::StringUtils::ToLower and Framework::Utils::StringUtils::FileName. This keeps launcher and Epic matching behavior consistent.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@code/framework/src/utils/string_utils.h` around lines 46 - 58, Remove the
duplicate ToLower and FileName helper implementations from the launcher and Epic
manifest code, and replace their uses with
Framework::Utils::StringUtils::ToLower and
Framework::Utils::StringUtils::FileName. Update the relevant code in
project.cpp, project.h, and manifest.h while preserving existing matching
behavior.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@code/framework/src/utils/string_utils.h`:
- Around line 46-58: Remove the duplicate ToLower and FileName helper
implementations from the launcher and Epic manifest code, and replace their uses
with Framework::Utils::StringUtils::ToLower and
Framework::Utils::StringUtils::FileName. Update the relevant code in
project.cpp, project.h, and manifest.h while preserving existing matching
behavior.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: e0f05989-03d7-45ef-a5c0-5876d321fba1

📥 Commits

Reviewing files that changed from the base of the PR and between 26de343 and e93686b.

📒 Files selected for processing (6)

• code/framework/CMakeLists.txt
• code/framework/src/external/epic/manifest.cpp
• code/framework/src/external/epic/manifest.h
• code/framework/src/launcher/project.cpp
• code/framework/src/launcher/project.h
• code/framework/src/utils/string_utils.h

🚧 Files skipped from review as they are similar to previous changes (5)

• code/framework/CMakeLists.txt
• code/framework/src/launcher/project.cpp
• code/framework/src/launcher/project.h
• code/framework/src/external/epic/manifest.cpp
• code/framework/src/external/epic/manifest.h