chore(release): v0.8.2 (#43)

Version bump 0.8.1 -> 0.8.2 across the app shell, the website and the README, plus v0.8.2 changelog entries for the native MySQL execution work merged in #42.

- desktop/package.json, desktop/src-tauri/Cargo.toml, desktop/src-tauri/tauri.conf.json, Cargo.lock (cargo-regenerated; gridline only - webview2-com-macros stays 0.8.1)
- www/public/landing.js + www/src/pages/index.astro const version; new top entry in www/src/data/changelog.ts
- version.test.ts, bundle-config.test.ts, docs-coverage.test.ts updated to 0.8.2
- README: both banners, both download tables (asset names + tags, incl. apt/dnf strings), MAINTENANCE comment, new v0.8.2 bullet

Verified: cargo build (gridline v0.8.2) + cargo test --lib 442 passed / 0 failed; bun run test 133 files / 1151 tests exit 0; tsc clean.

desktop/src-tauri/Cargo.lock

@@ -1796,7 +1796,7 @@ dependencies = [
 
 [[package]]
 name = "gridline"
-version = "0.8.1"
+version = "0.8.2"
 dependencies = [
  "bytes",
  "chrono",

desktop/src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "gridline"
-version = "0.8.1"
+version = "0.8.2"
 description = "An open-source, high-performance database GUI client for PostgreSQL and beyond"
 authors = ["you"]
 edition = "2021"

desktop/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Gridline",
-  "version": "0.8.1",
+  "version": "0.8.2",
   "identifier": "com.adrianbonpin.gridline",
   "build": {
     "beforeDevCommand": "bun run dev",