#44 Set color temperature in Mirek for lights and rooms (#48)

It is now possible to set the color temperature in Mirek for lights and
rooms.

### Examples: 

Set color temperature (in Mirek) of a single room:
```
openhue set light Studio --on --temperature 250
```
Set color temperature (in Mirek) of a single light:
```
openhue set light Desktop --on -t 490
```
Closes #44

New Get and Set scene commands (#41)

This PR introduces 2 new scenes' related commands: 
- the `openhue get scene` command that allows listing the available
scenes
- the `openhue set scene` command that allows activating a scene

### `openhue get scene`
```
Displays all the scenes with their main information, including the room they belong to.

Usage:
  openhue get scene [sceneId|sceneName] [flags]

Aliases:
  scene, scenes

Examples:

# List all scenes
openhue get scene

# List all scenes as JSON 
openhue get scene --json

# Filter scenes for a given room name
openhue get scenes --room "Living Room"

# Filter scenes for a given room ID
openhue get scenes -r 878a65d6-613b-4239-8b77-588b535bfb4a

# List multiple scenes using either the ID or the name of the scene
openhue get scenes "Palm Beach" Nebula 462e54d9-ec5d-4bf6-879d-ad34cb9a692e

Flags:
  -h, --help          help for scene
  -r, --room string   Filter scenes by room (name or ID)

Global Flags:
  -j, --json   Format output as JSON
```

### `openhue set scene`
```
This command allows the activate a scene using either a static or a dynamic palette.

Usage:
  openhue set scene [sceneId|sceneName] [flags]

Aliases:
  scene, scenes

Examples:

# Activate a scene
openhue set scene Soho

# Activate a scene by ID
openhue set scene 62af7df3-d390-4408-a7ac-4b6b8805531b

# Activate a scene in a specific room
openhue set scene Soho -r Studio

# Activate a scene with a dynamic palette
openhue set scene Soho -a dynamic

Flags:
  -a, --action string   action to perform on the scene. allowed: active (default), dynamic or static
  -h, --help            help for scene
  -r, --room string     room where the scene is located (in case multiple scenes with the same name exist)
```

The setup command now allows the set the bridge IP using the --bridge…

… flag parameter (#38)

Usage: 
```bash
openhue setup --bridge 192.168.1.100
```
or 
```bash
openhue setup -b 192.168.1.100
```

Added setup gif in README.md (#36)

![openhue_setup](https://github.com/openhue/openhue-cli/assets/39826516/beb11d77-2c2e-4f9a-98a7-e821e2073fe7)

New setup command (#34)

The setup command automatically discovers the Hue Bridge and ask user to
push the pairing button.


![openhue_setup](https://github.com/openhue/openhue-cli/assets/39826516/e2a6d1de-6296-437b-a85b-5785f4583652)

Using testify, added a few tests for the home_service.go methods (#32)

We are now using https://github.com/stretchr/testify to ease unit tests
writing.

Bump golang.org/x/net from 0.18.0 to 0.19.0 (#19)

The 'openhue set light' command now allows setting the color (#18)

Examples: 
```shell
# Set color (in RGB) of a single light
openhue set light 15f51223-1e83-4e48-9158-0c20dbd5734e --on --rgb #3399FF

# Set color (in CIE space) of a single light
openhue set light 15f51223-1e83-4e48-9158-0c20dbd5734e --on -x 0.675 -y 0.322

# Set color (by name) of a single light
openhue set light 15f51223-1e83-4e48-9158-0c20dbd5734e --on --color powder_blue
```

Bump github.com/spf13/cobra from 1.7.0 to 1.8.0 (#9)

The set light command now supports setting the brightness value (#16)

Examples: 

```shell
# Turn on a light
openhue set light 15f51223-1e83-4e48-9158-0c20dbd5734e --on

# Turn on multiple lights
openhue set light 83111103-a3eb-40c5-b22a-02deedd21fcb 8f0a7b52-df25-4bc7-b94d-0dd1a88068ff --on

# Turn off a light
openhue set light 15f51223-1e83-4e48-9158-0c20dbd5734e --off

# Set brightness of a single light
openhue set light 15f51223-1e83-4e48-9158-0c20dbd5734e --on --brightness 42.65
```