docs: split the 969-line README; put Install at the top

Install was at line 517 of 969, under the boot sequence, the snapshot lifecycle and the release process. Someone deciding whether to trust this with their backups should not have to scroll past any of that. README is now 211 lines: what it does, the minimum version, install, the support matrix, updating, uninstall. Everything else moved to docs/ (nested snapshots, how it works, recovery, CLI, releasing). A test enforces it: every internal link resolves, Install stays near the top, and the README does not grow back. Moving Markdown breaks cross-references -- it broke eight of them here, including one in a recovery doc, where the person following the link is by definition already having a bad day.
2026-07-13 18:34:44 +00:00
parent a1e31e9c0a
commit 252696f1de
9 changed files with 891 additions and 851 deletions
@@ -1,7 +1,7 @@
 # Changelog

 Work lands under **Unreleased** and stays there until a release promotes it. That
-is deliberate: see [Releasing](README.md#releasing). Twelve releases were cut on
+is deliberate: see [Releasing](docs/releasing.md). Twelve releases were cut on
 2026-07-13, several of them fixing the release before — and with the update alert
 live, every one of those interrupts every user. An alert people learn to ignore is
 worse than no alert, because one day it carries a security fix.