build: add VERSION-based release workflow

Introduce VERSION as the app version source of truth and add make bump-patch to increment VERSION, commit, and create a matching vX.Y.Z tag.

Wire VERSION into build outputs by injecting it into webterm.Version for make build-go and Docker image builds, and include VERSION in Docker build context.

Also remove the visible dashboard container count subtitle while keeping count updates in browser console logs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

README.md

@@ -2,7 +2,7 @@
 
 ![Icon](docs/icon-256.png)
 
-`webterm` serves terminal sessions over HTTP/WebSocket, with a dashboard mode for multiple sessions and Docker-aware tiles.
+`webterm` serves terminal sessions over HTTP/WebSocket, with a dashboard mode for multiple sessions and live-updating terminal tiles.
 
 This repository is the Go port of the original Python implementation, which is preserved in the `python` branch.
 
@@ -10,6 +10,7 @@ This repository is the Go port of the original Python implementation, which is p
 
 ## Features
 
+- Typeahead find for quickly finding and launching sessions with minimal friction
 - Web terminal with reconnect support
 - Ghostty WebAssembly terminal engine for fast rendering
 - Session dashboard with live SVG screenshots
@@ -101,6 +102,7 @@ make install-dev
 make check
 make race
 make test
+make bump-patch
 ```
 
 Frontend bundle tasks: