Refactor to enforce strictNullChecks

This commit applies `strictNullChecks` to the entire codebase to improve
maintainability and type safety. Key changes include:

- Remove some explicit null-checks where unnecessary.
- Add necessary null-checks.
- Refactor static factory functions for a more functional approach.
- Improve some test names and contexts for better debugging.
- Add unit tests for any additional logic introduced.
- Refactor `createPositionFromRegexFullMatch` to its own function as the
  logic is reused.
- Prefer `find` prefix on functions that may return `undefined` and
  `get` prefix for those that always return a value.

src/application/Parser/Script/Compiler/Expressions/Pipes/PipeDefinitions/InlinePowerShell.ts

@@ -28,7 +28,7 @@ function hasLines(text: string) {
 */
 function inlineComments(code: string): string {
   const makeInlineComment = (comment: string) => {
-    const value = comment?.trim();
+    const value = comment.trim();
     if (!value) {
       return '<##>';
     }

src/application/Parser/Script/Compiler/Expressions/Pipes/PipeFactory.ts

@@ -15,12 +15,6 @@ export class PipeFactory implements IPipeFactory {
   private readonly pipes = new Map<string, IPipe>();
 
   constructor(pipes: readonly IPipe[] = RegisteredPipes) {
-    if (!pipes) {
-      throw new Error('missing pipes');
-    }
-    if (pipes.some((pipe) => !pipe)) {
-      throw new Error('missing pipe in list');
-    }
     for (const pipe of pipes) {
       this.registerPipe(pipe);
     }
@@ -28,10 +22,11 @@ export class PipeFactory implements IPipeFactory {
 
   public get(pipeName: string): IPipe {
     validatePipeName(pipeName);
-    if (!this.pipes.has(pipeName)) {
+    const pipe = this.pipes.get(pipeName);
+    if (!pipe) {
       throw new Error(`Unknown pipe: "${pipeName}"`);
     }
-    return this.pipes.get(pipeName);
+    return pipe;
   }
 
   private registerPipe(pipe: IPipe): void {