Alter plugin manager commands

Previously, many of the commands for plugin managers installed the package as "nvim" which could be confusing. This pull updates several of them to install the package as "catppuccin" instead, alleviating the confusion

README.md

@@ -1,16 +1,9 @@
-<h3 align="center">
-	<img src="https://raw.githubusercontent.com/catppuccin/catppuccin/dev/assets/logos/exports/1544x1544_circle.png" width="100" alt="Logo"/><br/>
-	<img src="https://raw.githubusercontent.com/catppuccin/catppuccin/dev/assets/misc/transparent.png" height="30" width="0px"/>
-	Catppuccin for NeoVim
-	<img src="https://raw.githubusercontent.com/catppuccin/catppuccin/dev/assets/misc/transparent.png" height="30" width="0px"/>
-</h3>
-
 <p align="center">
-    <a href="https://github.com/catppuccin/catppuccin/stargazers"><img src="https://img.shields.io/github/stars/catppuccin/nvim?colorA=1e1e28&colorB=c9cbff&style=for-the-badge&logo=starship style=for-the-badge"></a>
-    <a href="https://github.com/catppuccin/catppuccin/issues"><img src="https://img.shields.io/github/issues/catppuccin/nvim?colorA=1e1e28&colorB=f7be95&style=for-the-badge"></a>
-    <a href="https://github.com/catppuccin/catppuccin/issues"><img src="https://img.shields.io/github/contributors/catppuccin/nvim?colorA=1e1e28&colorB=b1e1a6&style=for-the-badge"></a>
+  <h2 align="center">😸 Catppuccin for NeoVim</h2>
 </p>
 
+<p align="center">Warm mid-tone dark theme to show off your vibrant self!</p>
+
 <p align="center">
   <img src="https://raw.githubusercontent.com/catppuccin/nvim/dev/assets/ss.png"/>
 </p>
@@ -54,7 +47,7 @@ You can use your favorite plugin manager for this. Here are some examples with t
 #### Vim-plug
 
 ```lua
-Plug 'catppuccin/nvim'
+Plug 'catppuccin/nvim', {'as': 'catppuccin'}
 ```
 
 #### Packer.nvim
@@ -69,7 +62,7 @@ use({
 #### Vundle
 
 ```lua
-Plugin 'catppuccin/nvim'
+Plugin 'catppuccin/nvim', {'name': 'catppuccin'}
 ```
 
 #### NeoBundle