docs: add quick download links to landing pages

users landing on docs homepage or install page often want to
download IPFS quickly. previously they had to navigate through
multiple pages to find actual download links.

added tip boxes at the top of both pages with direct links to
install sections (via anchor fragments), so users who know what
they want can get there immediately while preserving the existing
page structure for those who need to explore options.

Closes #2129

Author: lidel

docs/README.md

@@ -15,6 +15,10 @@ Many popular projects are built with IPFS - see the [ecosystem directory](https:
 
 You can get started [retrieving data](#retrieve-data) and [providing data](#provide-data) to the IPFS network. If you'd rather develop applications, learn how to build IPFS-native apps or use standard HTTP in the [Build](#build) section.
 
+:::tip Quick Downloads
+Looking for downloads? Get [IPFS Desktop](./install/ipfs-desktop.md#install-instructions) (GUI), [Kubo](./install/command-line.md#install-official-binary-distributions) (CLI), or [IPFS Companion](./install/ipfs-companion.md#install) (browser extension).
+:::
+
 ### Retrieve data
 
 Quickly retrieve data from the IPFS network, no programming required:

docs/install/README.md

@@ -9,6 +9,10 @@ IPFS is a collection of protocols, packages, and specifications that allow compu
 
 Looking for an easy and opinionated way to get started with IPFS [Mainnet](../concepts/glossary.md#mainnet)? Try any of the options listed below:
 
+:::tip Quick Downloads
+Looking for downloads? Get [IPFS Desktop](./ipfs-desktop.md#install-instructions) (GUI), [Kubo](./command-line.md#install-official-binary-distributions) (CLI), or [IPFS Companion](./ipfs-companion.md#install) (browser extension).
+:::
+
 ## Desktop Users
 
 ### IPFS Desktop