Cache form inputs between runs

[Frooodle]

Description

Closes #1065 draft as missing lang updates

Also includes some null check stuff and memory enhancements

Checklist:

• [ ] I have read the Contribution Guidelines
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] My changes generate no new warnings

Contributor License Agreement

By submitting this pull request, I acknowledge and agree that my contributions will be included in Stirling-PDF and that they can be relicensed in the future under the MPL 2.0 (Mozilla Public License Version 2.0) license.

(This does not change the general open-source nature of Stirling-PDF, simply moving from one license to another license)

[sonarqubecloud[bot]]

Quality Gate passed

Issues
8 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud