chore: move bundle into Ace3/ subfolder + standard .gitignore

Matches the Exiles fork-layout convention (one folder per addon). README
and tools/sweep.py updated for the new path; tools/sweep.py stays at repo
root since it's dev tooling, not part of the shipped bundle.

.gitignore

@@ -0,0 +1,7 @@
+.env
+.DS_Store
+.release
+.install
+.lua/*
+.vscode
+.idea

README.md

@@ -57,11 +57,14 @@ Or replace the entire `Libs/Ace3/` tree in one go.
 
 ### Option 2: standalone addon
 
-Drop the contents (except `README.md` / `.gitattributes`) into
-`Interface/AddOns/Ace3/` and the loadable `Ace3.toc` will register every library at top
+Drop the **`Ace3/`** directory from this repo straight into
+`Interface/AddOns/` and the loadable `Ace3.toc` will register every library at top
 priority via LibStub. Useful for non-bundling forks (`chatter`, `sexymap`, `clique`, …) to
 get Ace without each one carrying its own copy.
 
+(The canonical bundle lives under `Ace3/` at the repo root so this repo follows the same
+"each addon in its own folder" layout as every other `Exiles/coa-*` fork.)
+
 ## Sync policy
 
 Bumping upstream means a single commit here, then a sweep across every fork that embeds these

tools/sweep.py

@@ -36,7 +36,7 @@ from pathlib import Path
 # --- configuration -----------------------------------------------------------
 
 REPOS_ROOT = Path(os.environ.get("REPOS_ROOT", "/home/sub/repos/coa"))
-BUNDLE     = Path(__file__).resolve().parent.parent   # the coa-ace3 repo root
+BUNDLE     = Path(__file__).resolve().parent.parent / "Ace3"   # canonical Ace3 lives under <repo>/Ace3/
 
 # Forks that this sweep MUST NOT touch. Document the reason inline.
 EXCLUDED_FORKS = {