Rewrite TabletBot to poise

- Uses serenity 0.12 (poise doesn't have a release targetting it yet)
- Fixes the Nix build action.

Author: jamesbt365

.editorconfig

@@ -7,5 +7,8 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 indent_style = space
 
-[**.{nix,sh,rs,toml}]
+[**.{nix,sh,toml}]
 indent_size = 2
+
+[**.rs]
+indent_size = 4

.github/workflows/nix.yml

@@ -8,12 +8,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v18
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v24
       with:
         extra_nix_config: |
           access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
     - uses: cachix/cachix-action@v12
+      if: github.event_name == 'push'
       with:
         name: opentabletdriver
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'

.gitignore

@@ -1,4 +1,5 @@
 .build/
 .history
 result
-
+target/
+state.json