Remove number prefix from documentation documents.

This is really unmanageabable, once a certain number of files has been exceeded.

Author: aentinger

Diff for: docs/README.md

@@ -2,7 +2,7 @@
 
 `Arduino_Threads/docs`
 ======================
-The Arduino threading APIs brings multi-threading to the world of Arduino. If you're new to the concept of threads we suggest you have first a look at the [Threading Basics](01-threading-basics.md) document.
+The Arduino threading APIs brings multi-threading to the world of Arduino. If you're new to the concept of threads we suggest you have first a look at the [Threading Basics](threading-basics.md) document.
 
 The following Arduino architectures and boards are currently supported:
 * `mbed_portenta`: [Portenta H7](https://store.arduino.cc/products/portenta-h7)
@@ -31,8 +31,8 @@ Download a preliminary, pre-built `arduino-cli` binary (experimental) or patched
 
 In the following documents you will find more information about the topics covered by this library.
 
-1. [Threading Basics](01-threading-basics.md)
-2. [Data exchange between threads](02-data-exchange.md)
-3. [Threadsafe `Serial`](03-threadsafe-serial.md)
-4. [Threadsafe `Wire`](04-threadsafe-wire.md)
-5. [Threadsafe `SPI`](05-threadsafe-spi.md)
+1. [Threading Basics](threading-basics.md)
+2. [Data exchange between threads](data-exchange.md)
+3. [Threadsafe `Serial`](threadsafe-serial.md)
+4. [Threadsafe `Wire`](threadsafe-wire.md)
+5. [Threadsafe `SPI`](threadsafe-spi.md)

Diff for: docs/06-cli-getting-started.md renamed to docs/cli-getting-started.md

@@ -107,4 +107,4 @@ If everything went as it should, the sketch is now uploading to the board, and o
 
 ![Uploaded sketch](./assets/uploaded.png)
 
-Now that you know how to do this, it might be a good opportunity to take the deep dive in the DIY-spirit, experiment with different workflows and interfaces for the terminal to tailor your Arduino experience to your liking. 
+Now that you know how to do this, it might be a good opportunity to take the deep dive in the DIY-spirit, experiment with different workflows and interfaces for the terminal to tailor your Arduino experience to your liking.

Diff for: docs/02-data-exchange.md renamed to docs/data-exchange.md

@@ -3,7 +3,7 @@
 Thread-safe `SPI`
 ===============
 ## Introduction
-`SPI` communication shares the same problems that [have been outlined](04-threadsafe-wire.md) for using `Wire` in a multithreaded environment. This is due to the fact that every `SPI` transaction consists of multiple function calls, i.e.
+`SPI` communication shares the same problems that [have been outlined](threadsafe-wire.md) for using `Wire` in a multithreaded environment. This is due to the fact that every `SPI` transaction consists of multiple function calls, i.e.
 
 ```C++
 digitalWrite(cs, LOW);