feat(config): json schema support

This PR includes the necessary code changes, CI changes and documentation to generate and deploy a full JSON schema for each release and the master branch, which can be used within config files for autocomplete and type checking.

docs/Compiling.md

@@ -101,6 +101,9 @@ cargo build --release --no-default-features \
 | workspaces+all      | Enables the `workspaces` module with support for all compositors.                 |
 | workspaces+sway     | Enables the `workspaces` module with support for Sway.                            |
 | workspaces+hyprland | Enables the `workspaces` module with support for Hyprland.                        |
+| **Other**           |                                                                                   |
+| schema              | Enables JSON schema support and the CLI `--print-schema` flag.                    |
+
 
 ## Speeding up compiling
 

docs/Configuration guide.md

@@ -20,11 +20,18 @@ Ironbar supports a range of configuration formats, so you can pick your favourit
 - `config.json`
 - `config.toml`
 - `config.yaml`
-- `config.corn` (Experimental, includes variable support for re-using blocks.
+- `config.corn` (Includes variable support for re-using blocks.
   See [here](https://github.com/jakestanger/corn) for info)
 
 You can also override the default config path using the `IRONBAR_CONFIG` environment variable.
 
+A hosted schema is available for the latest Git version ~~and each versioned release~~.
+JSON and YAML both support schema checking by adding the `$schema` key 
+to the top level of your config.
+
+- master: `https://f.jstanger.dev/github/ironbar/schema.json`
+- ~~release: `https://f.jstanger.dev/github/ironbar/schema-v0.16.0.json`~~ *(Not released yet)*
+
 ## 2. Pick your use-case
 
 Ironbar gives you a few ways to configure the bar to suit your needs.