feat: add Fedora/RHEL RPM package support with comprehensive documentation

Add native RPM package building for Fedora-based distributions:
- Extend electron-builder configuration to include RPM target
- Add rpm-build installation to GitHub Actions CI/CD workflow
- Update artifact upload patterns to include .rpm files
- Declare proper RPM dependencies (gtk3, libnotify, nss, etc.)
- Use xz compression for optimal package size

Documentation:
- Update README.md with Fedora/RHEL installation instructions
- Create comprehensive docs/install-fedora.md guide covering:
  - Installation methods (dnf/yum, direct URL)
  - System requirements and capabilities
  - Configuration and troubleshooting
  - SELinux handling and firewall rules
  - Performance tips and security considerations
  - Building from source
- Support for Fedora 39+, RHEL 9+, Rocky Linux, AlmaLinux

End-to-end support enables Fedora users to install Automaker via:
  sudo dnf install ./Automaker-<version>-x86_64.rpm

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

apps/ui/package.json

@@ -204,12 +204,35 @@
           "arch": [
             "x64"
           ]
+        },
+        {
+          "target": "rpm",
+          "arch": [
+            "x64"
+          ]
         }
       ],
       "category": "Development",
       "icon": "public/logo_larger.png",
       "maintainer": "webdevcody@gmail.com",
-      "executableName": "automaker"
+      "executableName": "automaker",
+      "description": "An autonomous AI development studio that helps you build software faster using AI-powered agents",
+      "synopsis": "AI-powered autonomous development studio"
+    },
+    "rpm": {
+      "depends": [
+        "gtk3",
+        "libnotify",
+        "nss",
+        "libXScrnSaver",
+        "libXtst",
+        "xdg-utils",
+        "at-spi2-core",
+        "libuuid"
+      ],
+      "compression": "xz",
+      "vendor": "AutoMaker Team",
+      "license": "SEE LICENSE IN LICENSE"
     },
     "nsis": {
       "oneClick": false,