qa: finishing psalm configuration

- changes `totallyTyped=true` to `errorLevel=1` which is equivalent
- adds `psalm.xml` to `.gitignore` while renaming it to `psalm.xml.dist`
- adds `psalm.xml.dist` to `.gitattributes` so we do not ship this component with its psalm config
- remove `.coveralls.yml` as we do not provide anything to coveralls with the new CI pipeline

Signed-off-by: Maximilian Bösing <2189546+boesing@users.noreply.github.com>

.gitattributes

@@ -7,3 +7,4 @@
 /phpcs.xml export-ignore
 /phpunit.xml.dist export-ignore
 /test/ export-ignore
+/psalm.xml.dist export-ignore

.gitignore

@@ -7,3 +7,4 @@
 /laminas-mkdoc-theme/
 /phpunit.xml
 /vendor/
+/psalm.xml

psalm.xml.dist

@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="1"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    errorBaseline="psalm-baseline.xml"
+>
+    <projectFiles>
+        <directory name="src"/>
+        <directory name="test"/>
+        <ignoreFiles>
+            <directory name="vendor"/>
+        </ignoreFiles>
+    </projectFiles>
+
+    <plugins>
+        <pluginClass class="Psalm\PhpUnitPlugin\Plugin"/>
+    </plugins>
+</psalm>