Rename the project to FieldCraft

Crates fieldcraft-*, binaries fieldcraft and fieldcraft-cli, the .fieldcraft file (format tag
fieldcraft/1, manifest fieldcraft.json), FIELDCRAFT_* environment variables, the MCP server
name, egui widget ids (fc_*), the app icon document FieldCraft.icon and its generated family,
docs and licences. No compatibility shim: no files of the earlier name exist.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

apps/fieldcraft-cli/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "fieldcraft-cli"
+description = "FieldCraft from the command line: list commands, run scripts, serve MCP"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+fieldcraft-engine = { workspace = true }
+fieldcraft-io = { workspace = true }
+fieldcraft-mcp = { workspace = true }
+serde_json = { workspace = true }