chore: add husky pre-commit hook and lint-staged configuration

- Created a pre-commit hook in .husky to run lint-staged.
- Added .lintstagedrc.mjs to format frontend files with Prettier and apply Spotless to backend Java files.
- Introduced .prettierignore to exclude specific directories from formatting.

frontend/src/app/components/rent-payment-reversal-dialog/rent-payment-reversal-dialog.html

@@ -1,41 +1,48 @@
 <h2 mat-dialog-title>Contrepasser le règlement</h2>
 <form [formGroup]="form" (ngSubmit)="submit()">
-  <mat-dialog-content class="action-dialog-content">
-    <p>
-      Les affectations de ce règlement de <strong>{{ formatEuro(payment.amount) }}</strong> seront
-      annulées. Le règlement restera visible dans l’historique.
-    </p>
-    @if (payment.refundedAmount > 0) {
-      <p class="refund-warning" role="note">
-        Les remboursements déjà confirmés, pour {{ formatEuro(payment.refundedAmount) }}, resteront
-        des sorties historiques.
-      </p>
-    }
-    <fieldset class="dialog-fieldset" [disabled]="saving()">
-      <mat-form-field appearance="outline">
-        <mat-label>Motif de la contrepassation</mat-label>
-        <textarea matInput rows="4" maxlength="500" formControlName="reason" required></textarea>
-        @if (form.controls.reason.invalid) {
-          <mat-error>Le motif est obligatoire.</mat-error>
-        }
-      </mat-form-field>
-    </fieldset>
-    @if (error()) {
-      <p class="dialog-error" role="alert">{{ error() }}</p>
-    }
-  </mat-dialog-content>
-  <mat-dialog-actions align="end">
-    <button mat-button mat-dialog-close type="button" [disabled]="saving()">Annuler</button>
-    <button
-      mat-flat-button
-      type="submit"
-      class="danger-action"
-      [disabled]="form.invalid || saving()"
-    >
-      @if (saving()) {
-        <mat-spinner diameter="18" aria-label="Contrepassation en cours" />
-      }
-      Contrepasser
-    </button>
-  </mat-dialog-actions>
+	<mat-dialog-content class="action-dialog-content">
+		<p>
+			Les affectations de ce règlement de
+			<strong>{{ formatEuro(payment.amount) }}</strong> seront annulées. Le règlement restera
+			visible dans l’historique.
+		</p>
+		@if (payment.refundedAmount > 0) {
+			<p class="refund-warning" role="note">
+				Les remboursements déjà confirmés, pour {{ formatEuro(payment.refundedAmount) }},
+				resteront des sorties historiques.
+			</p>
+		}
+		<fieldset class="dialog-fieldset" [disabled]="saving()">
+			<mat-form-field appearance="outline">
+				<mat-label>Motif de la contrepassation</mat-label>
+				<textarea
+					matInput
+					rows="4"
+					maxlength="500"
+					formControlName="reason"
+					required
+				></textarea>
+				@if (form.controls.reason.invalid) {
+					<mat-error>Le motif est obligatoire.</mat-error>
+				}
+			</mat-form-field>
+		</fieldset>
+		@if (error()) {
+			<p class="dialog-error" role="alert">{{ error() }}</p>
+		}
+	</mat-dialog-content>
+	<mat-dialog-actions align="end">
+		<button mat-button mat-dialog-close type="button" [disabled]="saving()">Annuler</button>
+		<button
+			mat-flat-button
+			type="submit"
+			class="danger-action"
+			[disabled]="form.invalid || saving()"
+		>
+			@if (saving()) {
+				<mat-spinner diameter="18" aria-label="Contrepassation en cours" />
+			}
+			Contrepasser
+		</button>
+	</mat-dialog-actions>
 </form>