Added PKGBUILD file and AUR helpers installation guide (#7)

* Added PKGBUILD for Arch-based distro installation

* Documented AUR helper installation in readme

* Updated PKGBUILD

* Changed AUR package name from glimpse-rust-git to glimpse

Author: alan-ar1

PKGBUILD

@@ -0,0 +1,34 @@
+# AUR Package Maintainer: Alan <github dot com slash alan-ar1>
+# Upstream Author / Project Maintainer: seatedro <me at seated dot ro>
+
+pkgname="glimpse"
+pkgver=r40.4208ee8
+pkgrel=1
+pkgdesc="A blazingly fast tool for peeking at codebases."
+arch=('x86_64' 'aarch64' 'i686')
+url="https://github.com/seatedro/$pkgname"
+license=('MIT')
+makedepends=('git' 'cargo')
+conflicts=("$pkgname")
+options=('!lto')
+source=("git+$url")
+sha256sums=('SKIP')
+
+pkgver() {
+  cd "$srcdir/$pkgname"
+   ( set -o pipefail
+    git describe --long --abbrev=7 2>/dev/null | sed 's/\([^-]*-g\)/r\1/;s/-/./g' ||
+    printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short=7 HEAD)"
+   )
+}
+
+build() {
+    cd "$srcdir/$pkgname"
+    cargo build --all-features --release
+}
+
+package() {
+    cd "$srcdir/$pkgname"
+    install -Dm755 "target/release/$pkgname" -t "$pkgdir/usr/bin/"
+    install -Dm644 "LICENSE" -t "$pkgdir/usr/share/licenses/$pkgname"
+}

readme.md

@@ -37,6 +37,15 @@ nix profile install github:seatedro/glimpse
 }
 ```
 
+Using an AUR helper:
+```bash
+# Using yay
+yay -S glimpse
+
+# Using paru
+paru -S glimpse
+```
+
 ## Usage
 
 Basic usage: