Restructure MasterBotArgs into ConfigFile that contains Bot/Webserver configs

[Jokler]

Is your feature request related to a problem? Please describe.
Currently the MasterBotArgs struct acts as the config file for the webserver too.

Describe the solution you'd like
The webserver configuration should be separate from the bot config with the config file being defined by a struct that contains both.

Additional context
Relevant lines of code:

pokebot/src/bot/master.rs

Lines 29 to 43 in 67c1189

	#[derive(Debug, Serialize, Deserialize)]
	pub struct MasterArgs {
	#[serde(default = "default_name")]
	pub master_name: String,
	pub address: String,
	pub channel: Option<String>,
	#[serde(default = "default_verbose")]
	pub verbose: u8,
	pub domain: String,
	pub bind_address: String,
	pub webserver_enable: bool,
	pub names: Vec<String>,
	pub id: Option<Identity>,
	pub ids: Option<Vec<Identity>>,
	}