chore: ignore dev-note artifacts, start alpha versioning at 0.1.0-alpha.1

.gitignore now excludes everything that is not part of the app itself:
memory/, research/, TODO-Feature-Docs/, HANDOFF*/GAMEPLAN notes, .codex/,
.claude/ and logs. Version begins the alpha line at 0.1.0-alpha.1 across
the cargo workspace, package.json and tauri.conf.json.

Cargo.toml

@@ -11,7 +11,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.1.0"
+version = "0.1.0-alpha.1"
 edition = "2021"
 rust-version = "1.77.2"
 authors = ["Trifecta Solutions"]