Add a getting_started page

Most devs know how to do the cargo stuff, its good to have but no need
to be front and centre.

Move the basic cargo stuff to its own page so as not to clutter the
intro.

While we move it, change the text to mention that "rand-std" is useful
for playing around because one can generate keys. Production devs should
probably know what they are doing with secrets anyways.

Author: tcharding

cookbook/src/SUMMARY.md

@@ -2,6 +2,7 @@
 
 [Introduction](./intro.md)
 
+- [Getting started](getting_started.md)
 - [Constructing and Signing Transactions](tx.md)
   - [SegWit V0](tx_segwit-v0.md)
   - [Taproot](tx_taproot.md)

cookbook/src/getting_started.md

@@ -0,0 +1,13 @@
+# Getting Started
+
+To add `rust-bitcoin` to your project, run:
+
+```bash
+cargo add bitcoin
+```
+
+If you are just exploring you probably want to use the "rand-std" feature so you can generate random keys:
+
+```bash
+cargo add bitcoin --features=rand-std
+```

cookbook/src/intro.md

@@ -4,19 +4,6 @@
 It contains Bitcoin network protocol and associated primitives.
 You can find more by reading the [documentation](https://docs.rs/bitcoin).
 
-To add `rust-bitcoin` to your project, run:
-
-```bash
-cargo add bitcoin
-```
-
-Additionally, you can add flags to enable features.
-Here's an example:
-
-```bash
-cargo add bitcoin --features=rand-std
-```
-
 This cookbook provides straightforward examples that showcase effective approaches
 for accomplishing typical Bitcoin-related programming tasks,
 and utilizing the Rust ecosystem's crates.
@@ -29,6 +16,7 @@ and constructing and signing transactions.
 
 This book contains:
 
+1. [Getting Started](getting_started.md)
 1. [Constructing and Signing Transactions](tx.md)
     1. [SegWit V0](tx_segwit-v0.md)
     1. [Taproot](tx_taproot.md)