feat(install): add cross-platform install scripts, release packaging, update documentation

Author: jntm7

README.md

@@ -35,3 +35,94 @@ Use `PITTERM_ENVIRONMENT=Development` to load `appsettings.Development.json`.
 ```bash
 dotnet test
 ```
+
+## Release Packaging (Cross-Platform)
+
+PitTerm can be packaged as self-contained binaries for Linux, macOS, and Windows.
+
+### Build release artifacts (macOS/Linux)
+
+```bash
+./scripts/release.sh 0.1.0
+```
+
+### Build release artifacts (PowerShell)
+
+```powershell
+./scripts/release.ps1 -Version 0.1.0
+```
+
+Both scripts publish for:
+
+- `linux-x64`
+- `linux-arm64`
+- `osx-x64`
+- `osx-arm64`
+- `win-x64`
+
+Output locations:
+
+- Raw publish output: `artifacts/publish/<rid>/`
+- Release archives: `artifacts/packages/`
+
+Archive format:
+
+- Windows: `.zip`
+- Linux/macOS: `.tar.gz`
+
+### Manual publish example
+
+```bash
+dotnet publish src/F1Tui/F1Tui.csproj \
+  -c Release \
+  -r osx-arm64 \
+  --self-contained true \
+  -p:PublishSingleFile=true \
+  -p:IncludeNativeLibrariesForSelfExtract=true \
+  -o artifacts/publish/osx-arm64
+```
+
+### Terminal support notes
+
+Recommended terminals:
+
+- macOS: iTerm2, kitty, alacritty
+- Linux: kitty, alacritty, GNOME Terminal
+- Windows: Windows Terminal (PowerShell or pwsh shell)
+
+If rendering appears odd, switch to Windows Terminal or a modern VT-compatible emulator.
+
+## Installation (One-Liner)
+
+You can continue creating GitHub Releases manually (recommended if you want custom release notes/comments), then let users install from release assets.
+
+### macOS/Linux
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/jntm7/pitterm/main/scripts/install.sh | bash
+```
+
+Install a specific version tag:
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/jntm7/pitterm/main/scripts/install.sh | bash -s -- --version v0.1.0
+```
+
+### Windows PowerShell
+
+```powershell
+irm https://raw.githubusercontent.com/jntm7/pitterm/main/scripts/install.ps1 | iex
+```
+
+Install a specific version tag:
+
+```powershell
+& ([scriptblock]::Create((irm https://raw.githubusercontent.com/jntm7/pitterm/main/scripts/install.ps1))) -Version v0.1.0
+```
+
+### Recommended release flow
+
+1. Build artifacts: `./scripts/release.sh <version>` or `./scripts/release.ps1 -Version <version>`
+2. Create GitHub Release manually and write custom notes
+3. Upload files from `artifacts/packages/`
+4. Users install with one-line scripts above