chore: replace meval with expr-solver-lib, drop reqwest from runtimes, fix AUR deps

- owlry-core: swap meval → expr-solver-lib for calculator and Lua math API;
  add ln() alias for meval compatibility
- owlry-lua: remove reqwest and meval (network features belong in plugins);
  add vendored feature flag so distro builds can link against system lua54
- owlry-rune: remove reqwest (same reason)
- aur/owlry-rune: fix depends (gcc-libs only; owlry-core → optdepends)
- aur/owlry-lua: fix depends (gcc-libs + lua54; owlry-core → optdepends)
- aur/owlry: add chmod -R a+rX for example plugins
- justfile: log aur-local-test output to build-logs/
- .gitignore: exclude build-logs/ and test-build-output files
- README: minor improvements (SIGHUP reload hint, plugin_config example)

aur/owlry-lua/.SRCINFO

@@ -6,8 +6,9 @@ pkgbase = owlry-lua
 	arch = x86_64
 	license = GPL-3.0-or-later
 	makedepends = cargo
-	depends = owlry-core
-	depends = openssl
+	depends = gcc-libs
+	depends = lua54
+	optdepends = owlry-core: daemon that loads this runtime
 	source = owlry-lua-1.1.3.tar.gz::https://somegit.dev/Owlibou/owlry/archive/owlry-lua-v1.1.3.tar.gz
 	b2sums = 648171ce688761babb7ada9ec96cb248fab5563cc45599f660f21e166bfb4db689cff22b82f3a1f2ae256dd54fb3d3f4d5a8acaf6a728976d42ee511e1f25e5f
 

aur/owlry-lua/PKGBUILD

@@ -6,7 +6,8 @@ pkgdesc="Lua scripting runtime for Owlry — enables user-created Lua plugins"
 arch=('x86_64')
 url="https://somegit.dev/Owlibou/owlry"
 license=('GPL-3.0-or-later')
-depends=('owlry-core' 'openssl')
+depends=('gcc-libs' 'lua54')
+optdepends=('owlry-core: daemon that loads this runtime')
 makedepends=('cargo')
 source=("$pkgname-$pkgver.tar.gz::https://somegit.dev/Owlibou/owlry/archive/owlry-lua-v$pkgver.tar.gz")
 b2sums=('648171ce688761babb7ada9ec96cb248fab5563cc45599f660f21e166bfb4db689cff22b82f3a1f2ae256dd54fb3d3f4d5a8acaf6a728976d42ee511e1f25e5f')
@@ -23,14 +24,14 @@ build() {
     cd "owlry"
     export RUSTUP_TOOLCHAIN=stable
     export CARGO_TARGET_DIR=target
-    cargo build -p $_cratename --frozen --release
+    cargo build -p $_cratename --frozen --release --no-default-features
 }
 
 check() {
     cd "owlry"
     export RUSTUP_TOOLCHAIN=stable
     export CARGO_TARGET_DIR=target
-    cargo test -p $_cratename --frozen --lib
+    cargo test -p $_cratename --frozen --no-default-features --lib
 }
 
 package() {