docs(installation): add mise installation alternative

src/installation/index.md

@@ -64,6 +64,7 @@ go build -ldflags "-X main.version=$(git describe --tags --dirty --always | sed
 - [Chocolatey](./chocolatey.md) (`Windows`)
 - [COPR](./copr.md) (`Linux`)
 - [GitHub CLI](./gh.md) (`Linux`, `macOS`, `Windows`, `FreeBSD`)
+- [mise](./mise.md) (`Linux`, `macOS`, `Windows`)
 - [Nix/NixOS](./nix.md) (`Linux`, `macOS`)
 - [MacPorts](./macports.md) (`macOS`)
 - [Scoop](./scoop.md) (`Windows`)

src/installation/mise.md

@@ -0,0 +1,21 @@
+# [mise](https://github.com/jdx/mise/) (Linux/macOS/Windows)
+
+If you are a passionate user of mise, then you can use that to install and manage `act`:
+
+No need to declare the plugin, it's already known by mise.
+
+Install/configure act:
+
+```shell
+# Show all installable versions
+mise ls-remote act
+
+# Install specific version
+mise install act@latest
+
+# Set a version globally (on your ~/.tool-versions or .mise.toml file)
+mise use -g act@latest
+
+# Now action-validator commands are available
+act --help
+```