Begin fleshing out readme

README.md

@@ -4,4 +4,60 @@ This is a CLI tool for compiling YAML files into a validated Playbill for [Prosc
 
 ## Usage
 
-todo
+```
+Usage:
+  muse [/path/to/binding.yaml] <options>
+
+Options:
+  --check         Only load and check the current binding and resources, but do not compile
+  --write         Write the output to a file. If not specified, outputs to stdout
+  --outfile       Specify the output file path [default: playbill.json]
+  --verbose, -v   Verbose output
+  --help, -h      Show this help message
+```
+
+## Binding File
+
+```yaml
+$binding: playbill
+id: the-playbill-id
+name: My Playbill
+author: My Name
+version: 0.0.1
+files: # optional
+  - "**/*.yaml"
+```
+
+## Definable Playbill Resources
+
+- ability
+- species
+- entity
+- item
+- tag
+- lore
+- method
+- rule
+
+### Shape: Ability
+
+```yaml
+$define: ability # Required
+id: ability-id # Required
+name: Ability Name # Required
+description: Some description # Required
+type: action | cue | trait # Required
+costs: # Optional, and each subfield is optional
+  ap: 1
+  hp: 1
+  xp: 1
+  ep: 1
+roll: none (default), fate or a talent # Optional
+boons: # Optional
+  - First boon
+  - Second boon
+banes: # Optional
+  - First bane
+  - Second bane
+
+```