Restructure and add quickstart to docs

docs/cli/overview.mdx

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+---
+title: "Overview"
+---
+
+Prerequisite: Set up an account with [Infisical Cloud](https://app.infisical.com) or via a [self-hosted installation](/self-hosting/overview).
+
+The Infisical CLI provides a way to inject environment variables from the platform into your apps and infrastructure.
+
+## Installation
+
+<Tabs>
+   <Tab title="MacOS">
+  	Use [brew](https://brew.sh/) package manager
+
+    	```bash
+    	# install
+    	brew install infisical/get-cli/infisical
+
+    	# check version
+    	infisical --version
+    	```
+
+    	## Updates
+
+    	```bash
+    	brew upgrade infisical
+    	```
+
+   </Tab>
+   <Tab title="Windows">
+      Use [Scoop](https://scoop.sh/) package manager
+
+    		```bash
+    		# install
+    		scoop bucket add org https://github.com/Infisical/scoop-infisical.git
+    		scoop install infisical
+
+    		# check version
+    		infisical --version
+    		```
+
+    		## Updates
+
+    		```bash
+    		scoop update infisical
+    		```
+
+   </Tab>
+	 <Tab title="Alpine">
+	 Install prerequisite
+		```bash
+		$ sudo apk add --no-cache bash sudo
+		```
+
+    	Add Infisical repository
+    	```bash
+    	$ curl -1sLf \
+    		'https://dl.cloudsmith.io/public/infisical/infisical-cli/setup.alpine.sh' \
+    		| sudo -E bash
+    	```
+
+    	Then install CLI
+    	```bash
+    	$ sudo apk update && sudo apk add infisical
+    	```
+
+   </Tab>
+	 <Tab title="RedHat/CentOs/Amazon">
+	 Add Infisical repository
+		```bash
+		$ curl -1sLf \
+		'https://dl.cloudsmith.io/public/infisical/infisical-cli/setup.rpm.sh' \
+		| sudo -E bash
+		```
+
+    	Then install CLI
+    	```bash
+    	$ sudo yum install infisical
+    	```
+
+   </Tab>
+	 <Tab title="Debian/Ubuntu">
+	 	Add Infisical repository 
+			
+		```bash
+		$ curl -1sLf \
+		'https://dl.cloudsmith.io/public/infisical/infisical-cli/setup.deb.sh' \
+		| sudo -E bash
+		```
+
+    	Then install CLI
+    	```bash
+    	$ sudo apt-get update && sudo apt-get install -y infisical
+    	```
+
+   </Tab>
+</Tabs>